Persistent fullness after double-chin liposuction: when is salivary gland reduction considered?
If fullness remains on both sides beneath the jaw after double-chin liposuction, subcutaneous fat may not be the cause.
The contour beneath the chin is shaped not only by subcutaneous fat, but also by deep fat beneath the platysma, muscles, submandibular glands, skin sagging, and chin structure.
Prominent deep volume on both sides beneath the jaw is often called "salivary gland enlargement." However, it may reflect an enlarged gland, a normally sized gland in a low position, or prominence caused by sagging surrounding tissues.
Persistent fullness after liposuction alone should therefore not determine the need for additional liposuction or salivary gland removal.
First, identify whether the remaining volume comes from fat, the submandibular glands, muscles, or sagging skin.
A double chin is not caused by fat alone
Fullness beneath the chin often brings weight gain or fat accumulation to mind. If subcutaneous fat immediately beneath the skin is the main cause, weight loss or liposuction may provide some improvement.
However, several structures contribute to the contour:
- Subcutaneous fat immediately beneath the skin
- Deep fat beneath the platysma
- Separated or sagging platysma muscle
- Submandibular glands beneath the jawbone
- Deep muscles beneath the chin, such as the digastric muscles
- Sagging skin and soft tissues
- A short or recessed chin
- The anatomy of the jawbone and cervical spine
There may be a single cause, but subcutaneous fat, muscle sagging, gland prominence, and other factors often coexist.
The American Society of Plastic Surgeons also explains that assessment for improving the neck and jawline should consider fat, skin, and neck muscles together. (American Society of Plastic Surgeons: Neck Lift Information)
Accurate correction therefore requires asking not only how much fat is present, but which structures and tissue layers obscure the jawline.
Why fullness can remain after double-chin liposuction
Conventional double-chin liposuction mainly reduces subcutaneous fat between the skin and platysma.
Deep fat beneath the platysma, the submandibular glands, and digastric muscles are difficult to adequately address with routine subcutaneous liposuction alone.
Fullness may therefore remain in the following situations:
1. Prominent submandibular glands
Even after subcutaneous fat is reduced, prominent glands on either side beneath the jaw may create fullness when viewed from the front or obliquely.
Liposuction does not enlarge the glands themselves. However, thinning the surrounding fat may make previously concealed gland contours relatively more visible.
2. Remaining deep fat beneath the platysma
Fat beneath the chin includes both subcutaneous fat and deeper fat below the platysma.
Routine subcutaneous liposuction alone may not adequately address subplatysmal fat. Whether correction is needed and how to approach it depend on its location and amount, accompanying skin and muscle sagging, and other planned procedures.
3. Separated or sagging platysma
The platysma is a thin muscle covering a broad area at the front of the neck. Separation in the midline or downward sagging can blur the chin-neck boundary and resemble a double chin.
In this situation, assessing the platysma and correcting it when necessary is important, rather than reducing fat alone.
4. Residual skin sagging
Even with less subcutaneous fat, poorly elastic skin may fold or sag beneath the chin. Removing fat alone when skin sagging is substantial may not sufficiently define the jawline.
5. A short or recessed chin
A short or recessed chin can make the boundary with the neck appear less defined. Fat or gland correction alone may not sharpen the jawline as expected, so skeletal structure should also be assessed.
What are the submandibular glands?
The submandibular glands are a pair of major salivary glands located on the inner and lower aspects of the lower jawbone.
The body has the following three pairs of major salivary glands:
- Parotid glands
- Submandibular glands
- Sublingual glands
The submandibular glands are particularly important for resting saliva production when not eating. Saliva moistens the mouth, assists swallowing and taste, and helps protect the teeth and oral mucosa.
These glands are normal structures present in everyone, but they may become more externally prominent for the following reasons:
- Naturally large glands
- A relatively low gland position
- Age-related loosening of surrounding supporting tissues
- Downward sagging of the skin and platysma
- Reduced surrounding volume after weight loss or liposuction
- A short chin that makes the area beneath it relatively more prominent
Visible fullness therefore does not always mean pathological salivary gland enlargement. Accurate assessment requires examining actual gland size and position as well as sagging of surrounding tissues.
How can fat be distinguished from gland prominence?
Subcutaneous fat generally has a soft, broad distribution beneath the chin. The submandibular glands may appear as more localized, deeper volume on both sides beneath the jawbone.
However, appearance in a mirror and touch alone cannot reliably distinguish them. A palpable structure beneath the jaw should not be self-diagnosed as a gland, muscle, lymph node, or another lesion.
Clinical assessment considers the following together:
- Whether prominence is central or on both sides
- Whether the same area persists after weight loss
- The amounts of subcutaneous and deep fat
- Whether gland size and position actually affect the contour
- Whether the platysma is separated or sagging
- Skin elasticity and the degree of sagging
- Chin length and projection
- Previous liposuction, contouring, or lifting surgery
- Symptoms suggesting disease, such as pain or swelling with meals
Ultrasound, CT, or other imaging may be needed if examination is inconclusive or salivary gland disease is suspected. Imaging is not essential in every cosmetic consultation; the decision depends on symptoms and examination findings.
Does "salivary gland removal" mean removing the entire gland?
Although patients often search for "salivary gland removal," cosmetic contouring beneath the chin often means submandibular gland reduction or partial resection of the portion projecting below the jawline, rather than removal of the entire gland.
Complete gland excision to treat disease and partial cosmetic reduction have different purposes and extents and should be distinguished.
Partial cosmetic reduction aims to limit the projecting portion while preserving the salivary duct and important surrounding structures, rather than removing the entire gland. The actual extent can vary with the patient's anatomy and technique.
The following points should therefore be clarified during consultation:
- Whether the procedure is total excision or partial reduction
- Which portion will be reduced and by how much
- Whether fat and the platysma will also be addressed
- The expected degree of jawline change
- Risks such as dry mouth and nerve injury
- How complications would be managed
When submandibular gland reduction may be considered
Not everyone with a double chin needs gland reduction. It may be considered selectively when the following conditions are identified:
- The gland is judged to be the main cause of fullness
- Prominence on both sides beneath the jaw persists after weight loss
- Subcutaneous fat has decreased after liposuction but deep prominence remains
- A neck lift or platysma correction alone is unlikely to achieve the desired contour
- The patient has experienced the benefits and limitations of submandibular botulinum toxin injections
- The expected improvement and surgical risks are adequately understood
Conversely, gland reduction alone may not provide satisfactory results in the following situations:
- Subcutaneous fat is the main cause of fullness
- Severe skin and platysma sagging
- A substantial contribution from deep fat or muscle prominence
- A short or recessed chin that blurs the chin-neck boundary
- Gland prominence has little influence on the overall jawline
- Preserving salivary function is particularly important because of existing dry mouth or other factors
A palpable gland alone is not a sufficient reason to operate. Its contribution to the overall contour, the achievable changes, and the risks must be assessed together.
Salivary gland botulinum toxin injections versus gland reduction
The procedure commonly called "salivary gland Botox" injects botulinum toxin into the submandibular glands to inhibit neural stimulation, reducing saliva secretion and inducing volume reduction.
It avoids incisions, but effects develop gradually and their degree and duration vary. Potential problems include dry mouth, swallowing discomfort, effects on nearby muscles, asymmetry, and inadequate effect.
Approved uses of cosmetic submandibular botulinum toxin injections can differ by product and purpose. Product-specific approval information and potential adverse effects should be explained before treatment.
Gland reduction surgically removes part of the tissue projecting beneath the jaw. It can directly reduce structural prominence, but requires an incision and recovery and carries surgical risks.
Category | Submandibular botulinum toxin injection | Submandibular gland reduction
Method | Inhibits neural stimulation and secretion to induce volume reduction | Directly reduces part of the projecting gland tissue
Incision | None | An incision for access beneath the chin may be needed
Timing of change | Develops gradually over time | Contour becomes apparent as postoperative swelling subsides
Duration | Effects may diminish over time | Structural reduction may persist relatively long term, but aging continues
Repeat treatment | May be needed | Repeat surgery is not necessary for every patient
Main risks | Dry mouth, swallowing discomfort, asymmetry, effects on nearby muscles, inadequate effect | Bleeding, hematoma, sialocele, salivary fistula, nerve injury, scarring, dry mouth
The choice cannot be based simply on the degree of prominence. Existing dry mouth, gland size and position, previous treatment response, desired changes, and willingness to accept risk must be considered together.
Can reducing the glands cause dry mouth?
Dry mouth and saliva production are among the most common concerns when considering this surgery.
Cosmetic surgery aims to reduce only the projecting portion and preserve as much function in the remaining tissue as possible. However, because these glands are important for resting saliva production, dry mouth cannot be categorically ruled out.
Temporary dryness or discomfort may occur, and a rare possibility of persistent symptoms must also be considered. More careful assessment is needed in particular for:
- Pre-existing dry mouth
- Conditions affecting salivary function, such as Sjögren's syndrome
- A history of head and neck radiation therapy
- Medications that can reduce saliva production
- Impaired function of both submandibular glands
- A high risk of tooth decay or gum disease
NCBI medical material describes the important role of submandibular glands in unstimulated saliva production. Although dry mouth after complete removal of one gland is described as uncommon, an effect on salivary function cannot be completely excluded. (NCBI Bookshelf: Submandibular Gland Excision)
What are the risks of submandibular gland reduction?
Important nearby structures include the facial artery and vein, facial nerve branches, lingual nerve, hypoglossal nerve, and salivary duct.
Possible complications include:
- Bleeding and hematoma at the surgical site
- Infection
- Bruising and swelling
- Induration, or firmness, beneath the chin
- Changes in skin sensation
- Scars and adhesions
- Sialocele, a collection of saliva within the tissues
- Salivary fistula, leakage of saliva through an abnormal tract
- Temporary or permanent weakness of lower lip movement
- Nerve injury affecting tongue sensation or movement
- Temporary or persistent dry mouth
- Asymmetry
- Undercorrection or overcorrection
- Less jawline improvement than expected
A 2025 review of aesthetic submandibular gland resection also reported hematoma, sialocele, salivary fistula, temporary nerve injury, dry mouth, and neck induration among the main complications. (Review of Aesthetic Submandibular Gland Resection)
A study of gland reduction combined with face and neck lifting reported major hematomas requiring early reoperation. The authors explained that gland reduction can add risks to a conventional neck lift and that indications should therefore be selected carefully. (Clinical Study of Submandibular Gland Reduction)
Patient characteristics and techniques differ across studies, so complication rates from a particular study cannot be applied uniformly to all patients. Complete excision for disease and partial cosmetic reduction also differ in scope, and their risks should not be interpreted on the same basis.
Before surgery, patients should understand that gland reduction operates in a deeper layer than simple liposuction and carries important risks such as bleeding and nerve injury.
A neck lift and platysma correction may also be needed
Even with prominent glands, if skin sagging or platysma laxity is the main cause of a poorly defined jawline, reducing the glands alone may not adequately improve the overall neckline.
Conversely, excessive reduction of central fat and muscle with persistent gland prominence on both sides may create an unnatural contour that is hollow in the middle and full at the sides.
Depending on individual anatomy, the following may be considered alone or in combination:
- Removal of subcutaneous fat beneath the chin
- Reduction of deep fat beneath the platysma
- Platysma correction
- A mini neck lift or neck lift
- Partial submandibular gland reduction
- Correction of chin structure
Removing more of every structure does not mean a better result. Excessive removal of subcutaneous fat or reduction of deep tissues can cause adhesions, surface irregularities, or an unnaturally hollow neckline.
A natural result therefore requires balancing reduction of structures that obscure the jawline with preservation of tissues needed for a smooth neck contour.
Symptoms that require assessment for gland disease first
A lump beneath the jaw should not be assumed to be simple gland prominence or a purely cosmetic issue.
With the following symptoms, assessment for salivary gland disease takes priority over cosmetic surgery:
- Sudden enlargement on one side beneath the jaw
- A firm or fixed lump
- Associated pain or warmth
- Recurrent swelling and pain beneath the jaw during meals
- Pus entering the mouth or an unusual taste
- A progressively enlarging lump beneath the jaw
- Unexplained weight loss or systemic symptoms
Salivary stones, inflammation, cysts, and tumors can occur in the submandibular glands. Recurrent swelling and pain during meals in particular warrant assessment for duct obstruction from a stone or another cause. (Asan Medical Center: Submandibular Gland Information)
Frequently asked questions
Q1. Does persistent fullness after weight loss mean enlarged salivary glands?
A. Not necessarily. Possible causes include subcutaneous or deep fat, platysma laxity, skin sagging, muscle prominence, and a short chin.
A normally sized gland may also look prominent because it sits low or surrounding tissues sag, rather than because it has actually enlarged.
Q2. Do I need gland removal if fullness remains after liposuction?
A. Persistent fullness alone cannot determine this. First establish whether the cause is the gland, deep fat, muscles and platysma, or sagging skin.
Depending on the cause, platysma correction or a neck lift may be needed instead of additional liposuction.
Q3. Can I distinguish glands from fat by touch?
A. Subcutaneous fat tends to feel soft and broadly distributed, whereas glands may be felt as localized deeper structures on both sides beneath the jawbone.
However, self-examination cannot reliably distinguish them, and lymph nodes or gland disease may be mistaken for simple gland prominence.
Q4. Is gland removal or botulinum toxin injection better?
A. Neither is better for every patient. Selection should consider gland position and prominence, dry mouth, previous treatment response, desired changes, and the burden of surgery.
Q5. Will gland reduction cause dry mouth?
A. Partial cosmetic reduction aims to preserve the function of remaining gland tissue and other salivary glands. However, because submandibular glands are important for resting saliva production, dry mouth cannot be completely excluded. Any pre-existing dry mouth must be disclosed before surgery.
Q6. Can fullness return after gland reduction?
A. Surgically reduced gland prominence does not necessarily return to exactly its previous state.
However, changes in the size or position of remaining glands, skin and muscle aging, weight changes, and tissue sagging may cause renewed fullness. Not every postoperative contour change can therefore be described simply as "gland recurrence."
Q7. Will reducing the glands alone create a sharp jawline?
A. The glands alone do not determine the jawline. Skin, subcutaneous and deep fat, platysma, and chin structure all contribute, so gland reduction alone may not produce the expected change.
Identify the remaining structures before removing more fat
Persistent fullness after double-chin liposuction can easily be interpreted as insufficient fat removal. However, the contour is formed by subcutaneous fat, deep fat, platysma, other muscles, glands, and the skeleton together.
If gland prominence is responsible, repeated liposuction is unlikely to provide the desired improvement. Excessive loss of subcutaneous fat may instead make existing glands and deep structures more conspicuous.
Conversely, if subcutaneous fat or skin sagging is the main cause, gland reduction may be unnecessary. The mere presence of normal glands is not a reason to remove them.
Salivary gland removal or reduction should therefore not be decided from the visible double chin alone. Previous surgery and the skin, fat, platysma, deep muscles, glands, and chin structure should be assessed together, followed by careful consideration of the expected changes and surgical risks.
If fullness beneath the chin remains after double-chin liposuction, please call 02-545-3700 or contact 'UVOM Plastic Surgery' on KakaoTalk.