It is narrated from Sayyiduna Abu Kabshah (may Allah be pleased with him) that the Prophet of Allah (peace and blessings be upon him) used to have cupping (hijamah) on the top of his head and between his shoulders, and he would say: "Whoever lets out this blood, then it will not harm him to treat anything with anything."
Hadith Referenceالمعجم الكبير للطبراني / مسند من يعرف بالكنى / 19061