Everybody wants a good marital life. However, it is true that no matter how sexually compatible you are as a couple, there are always chances that allergies or side-effects of the products used during sex, may come in your way of being a happy couple. An allergy on your penis can give you a tough time. And, it can be undoubtedly annoying and frustrating. Also, it can rob off your comfort. A rash may appear on the tip of the penis, making the whole area red. Also, it can be itchy. Notably, penis rashes are puffy welts or tiny bumps on the surface of the male reproductive organ. There are some harmless rashes and only cause a little irritation, however other forms of allergy could be a serious cause of concern and can take a lot of time to disappear. Here, we tell you about some common triggers of penis allergies.