My son aged15 years and always suffers from excessive sweating from both hands and sometimes axilla and foot , the hands are cold during sweat, bp130/90?

Hyperhidrosis: Granted no medical problems causing the excessive sweating, he might have idiopathic hyperhidrosis. Treatment options include: antiperspirant, anticholinergic meds, Botox injections (very effective) and surgery for the appropriate candidates. See doc to rule out secondary causes. If all negative, he most likely has idiopathic hyperhydrosis..