What's with cupping bubbles?

Cupping

is a common method of external treatment in traditional Chinese medicine.

It can remove cold and dampness,

and foaming is also a manifestation of evil in the body. It is common in patients with severe cold and

dampness. Cupping is mainly operated by vacuum suction. If the cupping time is too long, it may lead to subcutaneous vascular rupture, surface skin damage, and blistering. Generally, it is not recommended to stay in the cupping for more than 20 minutes

.