الحجامة
A therapy drawing blood to the skin's surface via suction cups, historically performed at specific points on the head and back, and recommended especially in hot weather.
الشِّفَاءُ فِي ثَلَاثَةٍ: شَرْطَةِ مِحْجَمٍ، أَوْ شَرْبَةِ عَسَلٍ، أَوْ كَيَّةٍ بِنَارٍ، وَأَنْهَى أُمَّتِي عَنِ الْكَيِّ
“Healing is found in three things: a cupping incision, a draught of honey, or cauterization by fire — though I discourage my community from cauterization.” (meaning, not a literal translation)
The Prophet ﷺ was reported to have been cupped both while fasting and while in the state of ihram during pilgrimage.
Ibn al-Qayyim discusses cupping within the humoral framework of releasing 'corrupted blood,' recommending it particularly in the second half of the lunar month and in warm climates when the blood is thought most active.