Hello, excessive seawting the condition called as hyperhydrosis, Although neurologic, endocrine, infectious, and other systemic diseases can sometimes cause hyperhidrosis, most cases occur in people who are otherwise healthy. “Heat and emotions(in your case ,its emotion or due to anxiety when you are in social gatherings) may trigger hyperhidrosis. treatment include relaxing yourself mentally when you are in social gatherings ,Oral medications like Anticholinergics reduce sweating.,Over-the-counter antiperspirants ,Iontophoresis, a device which passes ionized tap water through the skin using direct electricity.,Botox (botulinum toxin)-A, has been approved in the U.S. by the FDA for treating excessive axillary (underarm) sweating.,Surgery- A procedure called thoracic sympathectomy may be considered as a last resort.