Lump in the armpit

A lump in the armpit is likely to be a swollen lymph gland , particularly if you also feel unwell and have other signs of an infection. The glands in the armpit can swell to more than a few centimetres in response to infection or illness. Swollen glands usually go down when you recover.

It's uncommon for a lump in the armpit to be a lymphoma (cancer of the lymph glands), but you should see your GP if the lump doesn't go down.

A small, knobbly lump in your armpit that hangs off the skin like a wart is probably a skin tag. Skin tags grow where skin rubs against skin or clothing, which is why they're often seen under the arm. They're very common and harmless, and can be left alone.


Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018