Pimple Like Bumps In Armpit. A pea sized lump in armpit usually means you have a swollen lymph node under arms. The most common cause of armpit bumps are boils or abscesses folliculitis small pimple like lesions or an irritation from shaving or an applied product.

In most cases this is nothing serious and it resolves on its own in a few days. Bump under armpit from cyst boils or zits Boils cysts or abscess usually start off as large bumps under the armpit. An answer containing 5 tea tree oil was similarly as successful as benzoyl peroxide a pharmaceutical skin break out treatment.
Itchy armpits could be the reason behind Hidradenitis suppurative.
This condition can also be associated with tenderness or pain in the lump under the arm. Itchy armpits could be the reason behind Hidradenitis suppurative. A pimple in the armpit is a natural and a common occurrence. Red or pink bumps under your armpit are most likely a manifestation of a skin infection irritation or an allergic reaction.