Sunan Abi Dawud Book 29, Hadith 4
the maid-servant of the Messenger of Allah (ﷺ), said: No one complained to the Messenger of Allah (ﷺ) of a headache but he told him to get himself cupped, or of a pain in his legs but he told him to dye them with henna.
The Prophet (ﷺ) said: The best medical treatment you apply is cupping.
The Messenger of Allah (ﷺ) used to have himself cupped on the top of his head and between his shoulders, and that he used to say: If anyone pours out any of his blood, he will not suffer if he applies no medical treatment for anything.