Rash on penis only after sex then goes away

I have been with the same girl for about a year and a half and every time we have sex either with or without a condom I get a red rash with tiny red bumps on my penis and sometimes balls and inner thighs, However it dries up and flakes off  within a couple of days. I thought it may be herpes but it only shows up after sex and does so every time. I never had this problem with my previous sex partners. She also always has a thick white discharge most every time we have had sex but its not clumpy and doesn't smell. This has always been there sense I have been with her. I refuse to have sex with her a lot due to this problem and it has turned me off to her sexually and is causing problems in our relationship.  However I have not told her because I have not wanted to hurt her feelings and don't know if its something she can fix. I thought it may just be me and that the rash was something I would get regardless of my sex partner. But I recently had a fling with another girl with no condom for a good couple of hours a couple of times and she had a clear thin discharge There was no rash or bumps. This was the first time I have had sex in about a year that I didn't get a rash or bumps! It was awesome Is there something wrong with my girlfriends vagina? White discharge ongoing for about a year what's that about? Doesn't seem to be a yeast infection! Am I allergic to her discharge? I would like to try to work things out but I cant stay with a girl I cant have sex with? Any answers?

[Amoxaphobic]

I am not a doctor, so this is just an observation and suggestion. For a professional opinion, please consult a doctor.

My first reaction was maybe something to do with friction or heat. A heat rash is common, and sweat can increase your friction. However, your recent fling makes me think that it's possible your girlfriend and you just don't "click". You said this rash comes even when you use a condom? Does the rash occur in the areas the condom was covering?

You can always try to see if this is in fact the case by spreading her discharge elsewhere... If you are that active, I assume you have had it on your fingers. If you don't get the same reaction on your fingers then you can try a thinner skin such as your wrist. If the rash shows up on your wrist or a similar area as your penis, then you can probably assume that you two don't "click".

At that point you can look for solutions, such as a special lubricant or different condom. However, the first step is to find the cause.

If the same symptoms do not occur elsewhere on your body, try to compare the two females. What else was different? They obviously do not discharge the same, but was there anything else?

[Bhupinder Kaur, MD]

Hello,
This red spotty rash after intercourse can be due to dermatitis or friction rub during intercourse. Wash the areas several times with fresh water. Do not use any cosmetic products at the sites. 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.

Also ask your girlfriend to get a culture sensitivity of the thick vaginal discharge because you get the rashes only after intercourse with her. It is unlikely that it is an yeast infection but other STD’s need to be ruled out.
I hope it helps. Take care and regards.