<s>[INST] bump on my upper back right side of spine, about 2x2 cm, no pain, stiff growth doesnt move, when squeezed by my wife, this almost dry white pus came out very slowly, like in a white head, wife had to sqeeze and pinch very hard, but still no pain even though i have very sensitive skin and low pain tolarence. what could this be [/INST] Hi, Dear,Welcome with your query to Chat Doctor. Studied your query in full depth of its details. Reviewed it in context of your health concerns. Based On the facts, You mostly seem to suffer from-Sebaceous Cysts on upper back of spine, which was popped by you. Chat Doctor. I would suggest Excision of this Sebaceous Cyst by a Surgeon. Hope that, This reply would help you to plan further treatment soon with your treating doctors. Best of Luck and early recovery. Welcome any further query in this regard, which would be replied in next session. Good Day!! </s>