Bump under arm pit hello i, m a 47 yr old hispanic male. about 3 or 4 yrs ago i used to do alt of push ups and i developed a little bump under my arm pit it never bothered me so i just thought i pulled a muscle so i never had it checked ... the other hel

A : A lump under your arm pit definitely warrants investigation. It could be something as simple as a cyst (fluid filled lesion), swollen lymph node, abscess(infection) or a lipoma (fat filled lesion). More concerning would be a tumor that could possibly be malignant (cancerous). The bottom line is to have an examination by a medical professional. Best of luck.