Double chin
A double chin is fullness or a fold beneath the chin, also called submental fullness. It may reflect fat, loose skin, a smaller or retruded chin, muscle anatomy or a combination. It can occur at any body weight and is not by itself a sign of poor health.
What you may notice
- Fullness beneath the chin
- A less distinct angle between chin and neck
- A fold that changes with head position
- Loose skin or neck bands in the same area
- Limited chin projection
Why it can happen
Genetics and normal fat distribution are common contributors. Weight gain may increase submental fat, while ageing or weight loss can leave lax skin. Chin and jaw projection affect how fullness is perceived. Less commonly, a lump or swelling may be mistaken for ordinary fat.
What may help
Weight management may reduce fat when overall weight is a contributor, but it cannot change bone structure or reliably tighten loose skin. Non-surgical fat-reduction methods, liposuction, chin augmentation, skin-tightening procedures and neck lift surgery address different causes. Results depend on skin elasticity and anatomy, and fat removal can reveal laxity.
When to consult
Seek medical assessment for a new, firm, painful or one-sided lump, rapid change, or swallowing symptoms. For a stable aesthetic concern, consultation should distinguish fat, skin and skeletal support before selecting treatment.
Evidence and sources
- National Health Service. Liposuction [Internet]. London: National Health Service; 2023 [cited 2026 Nov 7]. Available from: https://www.nhs.uk/tests-and-treatments/cosmetic-procedures/cosmetic-surgery/liposuction/ (new tab)
- American Society of Plastic Surgeons. Liposuction [Internet]. Arlington Heights (IL): American Society of Plastic Surgeons; [cited 2026 Nov 7]. Available from: https://www.plasticsurgery.org/cosmetic-procedures/liposuction/ (new tab)
- American Society of Plastic Surgeons. Neck lift [Internet]. Arlington Heights (IL): American Society of Plastic Surgeons; [cited 2026 Nov 7]. Available from: https://www.plasticsurgery.org/cosmetic-procedures/neck-lift (new tab)