Question about veins, my veins are really showing tonight and one spot of my leg hurts and..what could this be?

DVT, varicose, etc: Painful veins could be many things including: varicose veins, blood clot (superficial or deep -- dvt), thrombophlebitis (inflammation/infection of the veins), an underlying muscle injury, underlying cyst, etc. See you md to evaluate.

Blood clot: This could also be something call superficial venous thrombosis (svt) or phlebitis. I would recommend that you are evaluated by your physician to differentiate from other possiblities such as DVT which was mentioned by dr. Thompson.

Varicose veins: Pain that came on quickly may be due a blood clot of the varicose vein or of a deep vein. Other causes of leg pain include musculoskeletal problems. You should be evaluated by a physician, to include a duplex ultrasound. If the pain has been longstanding, it may be due to the varicose vein itself. There are excellent minimally-invasive treatments for varicose veins. See a phlebologist/vein dr.