They may also stand out in people with low body fat, after exercise or heavy lifting, during hot weather, or when mildly dehydrated. Genetics can also make some people’s veins naturally more visible than others.
Regular exercise, drinking enough water, eating a balanced diet, avoiding smoking, and protecting the skin from excessive sun exposure may help support healthy circulation and skin.
See a healthcare professional if a vein suddenly becomes swollen, hard, warm, red, or painful. Persistent swelling, numbness, skin discoloration, or unexplained pain in one hand or arm should also be checked.