I am 31 years old and I take 5mg of warfarin everyday for the last seven years for a heart condition. About three weeks ago I had an itchy scrotum, this lasted a week, than my penis became very itchy and raw for two weeks. My left nipple has also been erect and sore for one week. It has been at least three years since I had sexual contact, so this is not the cause. Any idea what my problem is and any suggestions for treating it would be appreciated.