What causes rashes all over body after intercourse?
Patient: My husband eats peanut butter daily and has started adding it to his protien shakes. I am 44 and have been allergic to peanuts since I was 19. I abstain from eating peanuts but lately have been breaking out in rashes that last weeks and usually right after sex. Can peanut allergan show up in semen? Doctor: It's not peanut allergy from semen.The place, clothing ,bed-sheets etc.  at the site of sex need to be evaluated as potential allergens.