Why would one do a T2 or T2+T3 sympathectomy?
The only procedure that can cure severe Hyperhidrosis with Facial Sweating is a T2 sympathectomy, and the only procedure that can cure Facial Blushing is a T2+T3 sympathectomy. A T2, T3, T2+T3 or T4 sympathectomy is not recommended for hand or underarm sweating; the recurrence rate is too high following these techniques.