Redness of the penis is something we see often in Open House but is almost never associated with a sexually transmitted disease.
As you can see in the graph, more than 70% of all redness in penises that we have seen is due to fungal infections (thrush) which is not normally a sexually transmitted disease.
Fungal Infections (Thrush)
At Open House we see many cases of thrush infecting the head of the penis or the foreskin. It’s usually itchy and produces a white paste.
Often it has happened following sex, but it is not correct to say that the person caught it during sex. They are usually your own yeasts that have decided to appear and cause infection.
If you book an appointment with our doctor we can sort this out for you quickly.
Allergic reaction and dermatitis
In cases where the penis goes red after sex this is often an allergic reaction to the bodily fluids of the other person, or spermicides etc.. Similarly, many kinds of dermatitis (excema, psoriasis etc.) as decide to appear randomly in the genital area. Itching or stinging is common but tends not to be overwhelming.
Other causes and syphilis
Obviously there are many other causes of this type of symptom and not all of them are due to sexually transmitted disease. There is a rare and peculiar presentation of syphilis that sometimes can produce redness on the penis.
The only way to be certain of what we are dealing with is to book an appointment with our doctor. As we have said elsewhere in this website, we do have particular interest in syphilis.