How To Cure Red Fluid Bubble On Penis Tip?

I have a red fluid bubble on the tip of penus on the inside of where fluids come out. Not circumcise, and when pull back, skin is attached to bubble, Had it since I was young like five years old. How can I take care of this problem? 28, 6"1", knee surgery, apendix and large intestine surgery, no heart problems, not diabetic, no high blood pressure,