Introduction
Palmar hyperhidrosis (PH) is not an uncommon condition that is characterized by excessive sweating in the hand away from normal thermoregulatory needs. It apparently originates from not fully understood stimulation of sympathetic nervous system. Its incidence is almost 2% of the people worldwide and it apparently seems to have a genetic factor.
It affects males and females equally, mainly at adolescent age, with an underestimated incidence because of the feeling of shame as well as guilt of affected persons. This pathology has important implications on the life of the affected patients. Over years, numerous conservative medical and surgical treatments have been suggested. However, surgery is considered the best modality for its treatment. The interruption of sympathetic chain and ganglia via conventional sympathectomy or the cutting of sympathetic trunk (ST) via sympathectomy at different levels depending on the sweaty areas.

AIM OF THE WORK
The aim of the present study was to evaluate and to assess the compensatory sweating following VATS sympathectomy for the treatment of primary palmar hyperhidrosis at two different levels T2, 3 versus T2-4 regarding the incidence, site, severity and patient satisfaction.