Hypothyroidism is a disease of the thyroid gland not producing enough thyroid hormone. Symptoms include weight gain, dry skin, lethargy, excessive hair loss, menstrual problems, infertility, myalgias, drowsiness, and less activeness.

Check your thyroid profile once to make sure you are on the appropriate dose of thyroxine. If it is normal, then you need to consult a neurologist for your excessive sweating ( Hyperhidrosis ).