For t\past 3 years I had a small hard bump on the lower right side or my back (Kinda like t\Princess & the pea, when laying on my back or standing leaning against a firm surface I am always reminded its there). It can be painful but only in as such its hard & digs into my back or i try to pop it. It never seems to come to a head, finally had someone take a sewing need & a pair of tweezers (both soaked in alcohol). After a lot of digging a long black solid material was retrieved that came out as a string with a blood soaked end of the back head of t\snake. I cannot find any lump, bump or any of the cysts that have this type of material inside it.