Hi,Dear,Welcome with your query to HCM.
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-unknown bite as you rightly pointed in your query.
Second opinion from your Family doctor / Surgeon would fix the diagnosis.It could be boil with
cellulitis in very early stage as the blood has come out after you lanced it.
Don't be obsessed and paranoid about it being cancerous- as cancers are not tender or painful initially.
This reply would reduce your scare hope so.
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!!
Dr.Savaskar M.N.
Senior Surgical Specialist
M.S.Genl-CVTS