Why is there a vein popping out like a chord on the palm of my hand with redness around the surrounding area? i used the sauna for about 5 minutes and a few minutes after coming out i noticed a pinching pain that lasted for about a minute?

A vein popping out like a cord on the palm of the hand with redness around the surrounding area and a pinching pain after using a sauna for a few minutes may be caused by various factors such as dehydration, heat exhaustion, vasodilation, or inflammation. Heat stress can cause vasodilation and pooling of blood in the extremities, resulting in erythema (redness) and edema (swelling)