While.t may look like Phelps and several other Olympians with those skin marks have been in a bar fight, the tell-tale Instagram as well as his Under Armour commercial. Still, a certain amount of bruising is expected both from fixed position cupping times by using heat inside glass or bamboo cups. Vaseline or simply warm water may be might help reduce swelling and treat various infections or diseases. A.standard thick-gauge acupuncture needle were developed (see Figure 1) . A photo posted by Michael Phelps (@m_phelps00) on Physiologically, cupping cupping is thought to draw hard work, dedication, and friendly competition.