i am masterbating from 4 years , but from a year , after masterbation , my penis burns , sometimes intense. . i put cold water to get releive from pain and try to urinate but urine feels hot and as soon as it reaches the last part of penis to leave the body it just inflamates it like a match stick , after 30 mins of it everything becomes normal but veins of penis becomes more visible.. what is it. now every time this happens. i have come to a new city where river water is supplied. what should i do now