Pimple Like Lump Under Armpit. This condition can also be associated with tenderness or pain in the lump under the arm. They can be the size of a marble or as big as a tennis ball in worst cases.
If bacteria and germs have infected the sweat glands or pores in your left or right armpit red swollen lumps that are filled with pus could appear. Armpit lumps can occur in men and women of all ages. A small or pea-sized lump in the armpit can also be caused by a skin infection like a cyst or ingrown hair.
A pea sized lump in armpit usually means you have a swollen lymph node under arms.
Read below for more causes and treatments options. A pimple is characterized by an infection of a sebaceous gland. 32 years experience Dermatology. Pimples or pimple-like bumps in your armpit could appear as a small rash with a collection of bumps or you might just have one or 2 pimples.
