Hello,
The symptoms are suggestive of external hemorrhoid. Diagnosed by clinical examination, per rectal examination and anoscopy.
For the treatment, first of all make sure that your fiancé increases the fiber intake in his diet. Then local anesthetic creams, vasoconstrictors, protectants, antiseptics, analgesics(pain relievers),corticosteroids and keratolytics can be used. Non medical treatment involves sclerotherapy, Rubber band ligation, heat coagulation, cryotherapy and surgery.
It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.
sounds like a Hemroid to me, common, you can get them from forced entry, constipation aggressive or frequent bowel movements. You can easily find over the counter hemroid cream to help it heal faster, try and be gentle as possible on it.