What you have may be one of 2 possibilities. You might be having thrombophlebitis
which means inflammation of the veins which causes them to stand out. Or you could be having varicose veins
which usually occur in legs. Both conditions require you to meet a surgeon who can offer you either medical management by giving you a cream or compresses or operate and remove the varicose veins. Either way, you have to consult a doctor. Hope this helps.