The best and most beneficial days to have Cupping performed, also commonly known as the ‘Sunnah Days’ are the 17th, 19th or 21st of the Lunar calendar. It is also known as vacuum cupping, hijama cupping, horn treatment etc. It is a practice in which the therapist puts special cups on the skin to create suction. This causes the tissue beneath the cup to be drawn up and swell causing increase in blood flow to affected area.