Did you know that bruises which appear with cupping, are fundamentally different than bruises from trauma?
A bruise from trauma is very sensitive to the touch, while the bruise from cupping feels actually comfortable. Trauma causes the destruction of blood vessels and tissue. Cupping lifts the tissue, pulls stagnant fluid to the surface and allows blood and nutrients to perfuse the area. It is not comparable to a massage where tissue is compressed.
As it implies, fire is introduced into a cup to create the vacuum and heat up the glass. The warmth aids the softening of the tissue and works great for reaching deeper layers (muscle). This form of cupping is also well suited for chronic pain which responds to heat.