Dr Sirfraz Nazir from the British Cupping Society is one of those who is worried about rogue practitioners. The society strongly recommends that treatment should only be sought from health professionals.
He says he knows of several incidents of bad practice.
"A female patient with breast cancer came to see me. She was in the advanced stages of cancer because she had not been for her chemotherapy. She said she had been Hijama and that the practitioner had told her it would cure her.