Cold hands may be caused by being in a cold environment. It usually means that the body is trying to maintain its normal body temperature.
But, cold hand can also indicate vasospasm. Vasospasm happens when a brain blood vessel narrows, blocking blood flow.
This phenomenon can also mean that the body is reacting to the lowering of blood pressure or taking medications.
If for some reason a person’s blood pressure has dropped, the body thinks that somewhere the body has a serious loss of blood. There is a spasm of the vessels in the extreme in order to limit the blood flow in them temporarily. The spasm is strong enough for to keep your hands cold.
These seizures can be a sign of epileptic seizures (Epilepsy) and muscle tone disorders. Epilepsy is a chronic disorder that causes unprovoked, recurrent seizures. A seizure is a sudden rush of electrical activity in the brain.
One may develop cold hands due to Anemia, Buerger’s disease, Diabetes, Frostbite, Lupus, Raynaud’s disease and Scleroderma but the underlying principle is the same.