Hi, Welcome to the HCM Brief answer... it could by hyperthyroidism or metabolic disorder.. Detailed answer... Since sweating can occur normaly when there is increased temprature outside and body responses by increasing sweating to balance the body temprature..But if there is particular odor ,it can be disbalance of metabolism which can cause metallic odor. As thyroid hormones have crucial roles in controlling metabolism ,and if there is hyperthyroidism it can cause sweating and anxiety. Other cause can be amino acid metaboilc disorder. I would suggest that get thyroid function test ,blood electrolytes , urine test to detect amino acid metabolites , and follow accordinhly. Regards,Dr.Maheshwari