question: Hello doctor,From the past two days, I am feeling some kind of irritation in my penis head. At a normal time, I felt like something is stuck inside the penis. During urination also I felt itchiness. I observed penis but did not found anything wrong in the tip but saw some small white pimple like swellings in the lower area of the head of the penis. So, I started using hot water to wash but no change. Today I can see the tip of the penis is swollen and a white color coating on the tip. Also same irritation and a foul smell is their. What may be the cause of this disease. What precaution and medicine should I take?