<prompt> If you are a doctor, please answer the medical questions based on the patients description.Hi i have a lump, proberly -8cm from my armpit, i always check myself for things that should not be there and last night i found this lump under my skin. above my ribs. it moves but not around just slides from under my finger when i apply presure. what can this be.  <response>: Hi.it is best if you consult with a doctor, preferably a general surgeon, for medical and physical examination. Based from your description, it could be a cyst a sebaceous or a gelatinous type, a fibrous or a lipoma. These lesions can occur anywhere in the body and have the tendency to recur. Management medical and surgical will be directed accordingly. Hope this helps. Good day!! Chat Doctor. 