<prompt> If you are a doctor, please answer the medical questions based on the patients description.hello doctor im 31 my problem started like i felt burning when urinating then later i developed a bruise which is now large on the head of my penis glans and on the bruise a white or creamish layer develops and i clean it when bathing, on all the stds tests that i did at the hospital where negetive, but i was given some antibiotict and they seem not to work coz there is no change of improvement what really might it be  <response>: Hello Thank you for trusting Chat Doctor Usually, there will be a white creamy layer on glans penis rounded head of the penis, is called Sega formed by a combination of shed epithelial cells, oily secretion from glans penis and moisture. Formation of Sega is normal phenomenon. But it is associated with rash, itching foul smell then there is a possibility of infection. Are you diabetic??? Since how many days youre suffering?? Have you using any Chat Doctor? What about culture of creamy layer, wet mount. Treatment :1. Till that time take Candid b gel for local application. 2.maintain good personal hygiene. 3.avoid new cosmetics may cause allergy. Consult your doctor if symptoms not improved. 