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Bulimia and swollen cheeks

A common and visible sign of bulimia is swelling of the cheeks, sometimes called "puffy" or "chipmunk" cheeks. It comes from enlargement of the parotid glands, the large salivary glands that sit just in front of the ears. The swelling is usually on both sides, gives the lower face a fuller and more rounded look, and is generally painless. It can be one of the more distressing signs because it is hard to hide, and it often appears just as someone is trying to stop purging. It usually improves with time, and bulimia is treatable.

This page explains why the cheeks swell, when it happens, and what it means. For the full condition, see bulimia: signs, symptoms, and treatment.

Why the cheeks swell

Repeated vomiting overstimulates the parotid glands, and they respond by enlarging, a condition called sialadenosis. The leading explanation is that the cholinergic stimulation of vomiting drives the gland's cells to grow (acinar hypertrophy).¹ The swelling is characteristically bilateral (both sides) and only minimally tender, which helps distinguish it from an infection or a one-sided lump.¹² It is common in bulimia: parotid enlargement has been reported in roughly 10 to 68 percent of people with the disorder across studies, more often in those purging frequently.²

Parotid swelling in bulimia, at a glance

Both sides

the swelling is characteristically bilateral and only minimally tender

3-4 days

after purging stops is when the swelling is often most noticeable

10-68%

of people with bulimia develop parotid enlargement across studies

When it appears

One feature surprises people in recovery: the swelling often becomes most noticeable after purging stops, typically around three to four days afterward.¹ So the cheeks can puff up right when someone is doing the hard work of stopping, which can feel discouraging. It helps to know this is the gland reacting, not a sign that anything is going wrong.

Does it go away?

Usually it improves once purging stops, and the enlargement is generally temporary.³ But it can be slow, and complete resolution is not guaranteed.² The single most important step is ending the purging; the enlargement tends to subside over time, and a doctor can advise on the rare cases that need more than that. Trying to treat the cheeks while purging continues does not address the cause.

A sign worth acting on

Bilateral, painless cheek swelling in someone who is purging is a recognized physical sign of bulimia. Because it is visible, it can be the clue that prompts a person or their family to seek help. The swelling itself is not dangerous, but the eating disorder behind it carries real medical risks, and it is treatable. To understand the condition and the levels of care, see bulimia: signs, symptoms, and treatment; if you are supporting someone, how to help a loved one start treatment.

References

Mehler PS, Rylander M. Bulimia Nervosa: medical complications. Journal of Eating Disorders. 2015;3:12. Parotid enlargement (sialadenosis) is generally bilateral and only minimally tender; the "chipmunk-type" facies generally occurs three to four days after the cessation of self-induced vomiting. ↩ ↩ ↩
Garcia Garcia B, et al. Bilateral Parotid Sialadenosis Associated with Long-Standing Bulimia: A Case Report and Literature Review. Journal of Maxillofacial and Oral Surgery. 2016. Bilateral, non-painful parotid swelling attributed to cholinergic stimulation and acinar hypertrophy; sialomegaly reported in about 10 to 68 percent of people with bulimia; spontaneous resolution occurs but is slow and not guaranteed. ↩ ↩ ↩
Vavrina J, Müller W, Gebbers JO. Enlargement of salivary glands in bulimia. Journal of Laryngology and Otology. 1994. Bilateral salivary-gland enlargement (parotid and submandibular) from sialadenosis; the enlargement is usually transient, so surgical intervention is rarely required. ↩

Common questions

Why does bulimia cause swollen cheeks?

Repeated vomiting overstimulates the parotid glands, the large salivary glands in front of the ears, causing them to enlarge. The swelling is usually on both sides, gives the lower cheeks and jaw a fuller, rounded look, and is generally painless or only mildly tender.

When do the swollen cheeks appear?

The enlargement, sometimes described as 'chipmunk cheeks,' often becomes noticeable a few days after purging stops, typically around three to four days. That timing can be distressing in early recovery, but it reflects the glands responding, not a setback.

Do swollen cheeks from bulimia go away?

Often they improve once purging stops, and the enlargement is usually temporary. But it can take time, and full resolution is not guaranteed. The most important step is stopping the purging; a doctor can advise on anything beyond that.

Is parotid swelling painful or dangerous?

It is usually painless or only mildly tender and is not, by itself, dangerous. It is a visible sign of an underlying eating disorder, and that is what needs care, since bulimia carries serious medical risks of its own.

Can swollen cheeks be a sign of an eating disorder?

Yes. Bilateral, painless parotid swelling in someone who is purging is a recognized physical sign of bulimia. If you notice it in yourself or someone you care about, it is worth treating as a prompt to seek an assessment.

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