Visible veins on the hands, arms, or chest are usually harmless—often due to aging, genetics, thin skin, low body fat, exercise, heat, or hormone changes.
However, sudden appearance without clear cause, or symptoms like pain, swelling, redness, or skin changes, could signal circulation issues, varicose veins, or even more serious conditions.
See a doctor if veins appear suddenly, hurt, or come with other symptoms.
