### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
Hi, I am a 22 year old man and I am fairly sexually active. For as long as I can remember I have had what looks like a large vein on the left hand side of my penis that runs directly up the shaft under the foreskin and stops about 3/4 of the way up where it meets a rounded sort of lump. The lump is curled round not so that it is circular but that sort of shape but I m quite sure it s attached to the vein. It s fairly soft and can be moved around. I thought nothing of it when I first saw it several years ago but I had thought what it might of been the other day and with a bit of research on the Internet I can only assume that it is a blood clot, and possibly the dorsal vein.. However it does not hurt in any way neither when having sex or when flaccid and when its touched, this is why I haven t done anything until now. I have read a few things on the Internet though which has got me worrying. I sometimes get short of breath and my chest sometimes hurt a long with sharp pains in the bladder sort of area but I m also stressed and think that those things could have something to do with that. Any sort of opinion on what it could be would be much appreciated. Thanks

### output:

HelloThanks for query. You have prominent Varicose vein which is tributary of Superficial Dorsal Vein of penis. It is not uncommon to find such a prominent Varicose vein on dorsal aspect of penis in many individuals. It is neither going to ave negative effect on your sexual potency nor going to interfere during intercourse. There is no active treatment to resolve these veins . All the symptoms that you have are in no way related to this varicose vein. Do not worry about it and do not get confused yourself by surfing on Internet, Chat Doctor. 