T3/T4 endoscopic thoracic sympathicotomy is a widely accepted and effective treatment for primary palmar hyperhidrosis. However, sympathetic ganglions are invisible with traditional thoracoscopy and until now, the location of ganglions are confirmed by rib indirectly. The team from thoracic department of Peking University People's Hospital discovered that the sympathetic ganglions can be visualized with fluorescent thoracoscopy. Thus, investigators want to apply fluorescent thoracoscopy in sympathicotomy of palmar hyperhidrosis, to conduct a more precise operation and compare the efficiency of the novel and traditional methods.

Inclusion Criteria:

1. Diagnosed with primary palmar hyperhydrosis.
2. Accept surgical treatment and signed informed consent.

Exclusion Criteria:

1. Liver dysfunction.
2. Allergic to indocyanine green.
3. Can't tolerate thoracoscopic surgery.

patients suffering from primary palmar hyperhidrosis