<s>[INST] I am a 22, 230lb, 5'11" year old male with no history of health issues. Found a pea size lump in my armpit, there is no discoloration and not does stick out. I only found it because of an inch. Its also not sensitive and hasn't changed in the 24 hours [/INST] Hi,Welcome to HCM.That lump could be a lymph node swelling following some infection in the chest or head and neck region.It could even be  lipoma or sebaceous cyst if it is just under the skin.You need to show it to a surgeon for a clinical evaluation to help reach a diagnosis and further management.RegardsDr. Ashish Verma </s>