<s>[INST] I have recently discovered a little lump under my armpit and it hurts to the touch, its not hard on the surface its more like a pimple but when i press it it gets hard it hurts when i move my arm I dont know what is it Im gonna get it checked tomorrow I am so worried though [/INST] Respected user , HiWelcome to Healthcaremagic.comI have gone through your concern in depth .*  This seems inflammatory condition involving subcutaneous space may be    sebaceous cyst , boil or else .*  Need  clinical confirmation with examination or evaluation with high    resolution photo pic as an attachment .Hope this will help you for sure .Wishing you fine recovery from the same .Regards . </s>