Good Afternoon. Our Son Is 22 Years Old, 6'3" And

Good afternoon. Our son is 22 years old, 6'3" and weighs 245 lbs. He was a very involved athlete in high school, and is not a part of college athletics except for occasional intramural activities. His only current health issue, that we know about for sure, is allergies. He has always had a "sweating" problem, but has seen an increase in excessive sweating the past few months. Could this be a symptom of something?