Pain in Penis forehead. Solve the pain.

I am 28 years of age. I was addicted to porn since last 2-3 years. I used to masturbate roughly without any lubricant. The penis forehead is now paining. It is paining in the forehead area. Also it is loosing color and has become colorless near the tip area. Rest of the forehead is red in color. It pains more when erect. When it is erect then touching the forehead has sharp pain. I consulted a doctor before. He told that it will heal automatically and advised to exercise regularly. Since one year i am eating good food and exercising daily and yoga too. I only masturbate once a month. I have left porn entirely. Around one year has passed but no effect is there. Pain has reduced but only a little bit. The area near the tip is still colorless and looks like varicose vein in color. There is no problem in erection. Erection is normal. Please suggest me how to treat this. I am getting depression due to this and feeling worthless. Is there any ointment/cream which can solve the pain.