Suggest Treatment For Redness And Intermittent Abrasion Like Sore On Penis

Hello, Recently I have encountered discomfort during intercourse and oral sex with my partner of five years. What I figured in the past (roughly since October or November) to be the effect of maybe catching the head in my zipper or making contact with my girlfriends Nuva Ring, has now got me concerned. There are no typical symptoms that I can find relate to my case, but stopped at Chlamydia. The sore sensation is a red, isolated spot on the left side of the corona that looks almost like an abrasion. The red coloration is noticeable when the penis is erect and sometimes begins to dry, but no discharge from the penis or the red sore exists, no burning urination occurs, and the abrasion-like sore is very inconsistent.