Friction Burn after sex?

I have been dating my current girlfriend for a long time now, and ever since we first started having sex without a condom I have been getting what looks to be rug burn on one side of my penis.  It heals perfectly fine in a few days without any intercourse or masterbation (masturbation), but it will come back right after we have sex the next time.  We use lube, however it still will happen again.  It really isn't painful, more like a sensitive to the touch.  It only happeneds to one side of the head and down the one side of the shaft.  Is there some skin sensitive problem i have?  Also, I apologize if this is graphic, sometimes after a long "session" it can be really bad, to the point where there is actually tiny wounds.  Any adivce on how to stop this?  Why this happeneds?

Thanks for your time.

[glhwcu]

Also after reading some other comments about herpes and other sorts, i just wanted to clarify there really isnt anything close to a blistering, it litterally looks like rug burn, dry skin.

[lightsbane]

i'm in the same predicament.

[Dr J Singh]

Hello,
Without examination,confirmation of a diagnosis is tough but this swelling can be due to friction rub or chaffing. Chafing is a continuous rubbing of the skin that causes redness or soreness.

Chafing occurs when the skin becomes irritated by the friction caused by rubbing – either against other skin or against a foreign material. Wash the areas several times with fresh water. Do not use any cosmetic products at the sites.Abstain from intercourse till the symptoms completely disappear. You can apply some calamine lotion at the rash as it will help in soothing the skin.Also wear cotton undergarments.Application of mild corticosteroid cream and oral antiinflammatories like ibuprofen/acetaminophen are also helpful.If the symptoms are severe then it will be best to consult a dermatologist.Contact dermatitis and latex allergy to condoms has to be ruled out.

I hope that helps.Take care and pls do keep me posted.