hi i keep getting soars on the bottom of my penis head where it joins the shaft skin. what happens is i get a bit tender then while having sex it spilts and becomes a red soar for a couple of days then clears up. but keeps coming back. i did split upwith my partner of 20 years for a year and met someone else. but iv been back with my partner for 3 years again now, and this never happened up untill the change of partners. i did go to a gum clinic and had all tests done, and they just give me a fungle cream. but this keeps returning and is affecting our sex and or lives.