A.S.
You might want to get him checked out for a heart murmur. My son used to sweat so bad I'd change his clothes multiple times a day, I took him to the doctors and she found a murmur. We went to a cardiologist and they found he had narrow tubes going to his lungs and a hole in his heart. That was when he was under a year old, he's almost 3 now. No surguries needed and he's doing much better. Most murmurs go away on thier own and some small holes can be left. Seeing that your son is 2, they should have found it by now, but it's worth a ask next time your at the doctors with him! Goodluck, hope all is well!