Just over night my hands have gone yellow like there stained but i know i havent touched or cooked anything that could have done this.

Carotenemia: Carotenemia is a clinical condition characterized by yellow pigmentation of the skin (xanthoderma) and increased beta-carotene levels in the blood. In most cases, the condition follows prolonged and excessive consumption of carotene-rich foods, such as carrots, squash, and sweet potatoes. Could this be possible in your case?

See a doctor: Yellowing of the skin may indicate a problem with the liver. Please see a doctor as soon as possible for an exam and blood tests. If you have any symptoms of liver disease like abdominal pain or nausea you may need to go to Emergency or an Urgent Care today.

Hands : Yellow hands can be due to jaundice or eating too much carrots or staining from chemicals. Please consult your doctor.