I have made this practice few months ago. This is known as Wet cupping. It has many advantages specially for the treatment of blood disorders.
The whole process takes about half an hour. the process is little painful but has many advantages.
Wet cupping sucks dirty blood from the area placed cup.
You can see blench of blood after cupping is over .
Those who don't like wet cupping or annoying of blood for them i apologize..