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-
Bulbar
Urethritis with peri-urethral abscess? or cellulitis- as it causes pain while peeing.Also your doctor has confirmed it that the hard lump at the base of the urethra just anterior to anus is due to urethritis.
USG or Contrast Urethrography would fix the extent and cause of such lump .
Other causes for such a complaints could be ruled by
Second opinion from a Surgeon or Dermatologists who would physically assess various causes for such a hard lump near the anal hole.
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!!
Dr.Savaskar M.N.
Senior Surgical Specialist