Hi,Welcome to HCM.
You seem to have Boil in early stages below the belly button,as only blood gushed out when you pressed it out.
Hence I would suggest you to get
Second Opinion from Surgeon,who would direct for its management after needful physical and radiological check up.
-Treatment-
Cold Compresses.
-Tab Anti-inflammatory under guidance from your doctor.
-Antibiotics to treat boil/
furuncle causing that lump below belly button.
-Test Blood for FBS /PPS/ and Thyroid profile, to rule out any accompanied primary or
hypothyroidism with
secondary diabetes as you had
diarrhoea concurrent to the lump.
-Surgeons consultation and needful further treatment as directed from him.
Hope this would help you to plan treatment with your doctor.
Will appreciate your review write up and hitting thanks,to help needy patient visitors like you at HCM.
Welcome for any further query in this regard.
Good day!!
Dr.Savaskar M.N.
Senior Surgical Specialist.
M.S.Genl-CVTS