With regard to the times when cupping is recommended:
It was reported from Ibn ‘Abbaas (may Allaah be pleased with them both) that the Prophet (peace and blessings of Allaah be upon him) said: “The best times to be treated with cupping are the seventeenth, nineteenth or twenty-first [of the month].” (Reported by al-Tirmidhi, 2054; the isnaad is da’eef).
It was reported from Anas ibn Maalik (may Allaah be pleased with him) that the Prophet (peace and blessings of Allaah be upon him) said: “Whoever wants to be treated by cupping, let him do it on the seventeenth, nineteenth or twenty-first, lest the blood flow too copiously and kill him.” (Reported by Ibn Maajah, 3489; there is some weakness in the report).
Abu Hurayrah (may Allaah be pleased with him) reported that the Prophet (peace and blessings of Allaah be upon him) said: “Whoever is treated with cupping on the seventeenth, nineteenth or twenty first, will be healed from all diseases.” (Reported by Abu Dawood, 3861, and al-Bayhaqi, 9/340. The isnad is hasan).
Al-Haafiz ibn Hajar (may Allaah have mercy on him) said: “According to the doctors, the most efficacious cupping is that which is done at the second or third hour, after having intercourse or taking a bath, etc., and neither on a full nor empty stomach. With regard to specific days for administering cupping, it was reported in a Hadeeth narrated from Ibn ‘Umar by Ibn Maajah that the Prophet (peace and blessings of Allaah be upon him) said: ‘Administer cupping, may Allaah bless you, on Thursdays, and administer cupping on Mondays and Tuesdays, but avoid cupping on Wednesdays, Fridays, Saturdays and Sundays.’ It was reported with two da’eef isnads, and there is a third version, also da’eef, reported by al-Daaraqutni in al-Afraad. He also reported it with a jayyid isnaad from Ibn ‘Umar but it is mawqoof (the isnad stops at the Sahaabi). Al-Khallaal reported that Ahmad disliked cupping on the days mentioned, even though the Hadeeth was not proven. It was said that a man was treated with cupping on a Wednesday and he developed leprosy because he ignored the hadeeth. Abu Dawood reported from Abu Bakrah that he disliked cupping on Tuesdays, and said: “The Messenger of Allaah (peace and blessings of Allaah be upon him) said: ‘Tuesday is the day of blood, and on that day there is an hour when blood does not stop.’ The doctors are agreed that cupping in the second half of the month, especially in the third quarter, is more beneficial than cupping at the beginning or end of the month. Al-Muwaffaq al-Baghdaadi said: The body fluids (humours) flow heavily at the beginning of the month and calm down at the end, so the best time to let the blood flow is in the middle of the month.”
It is essential to make sure that you do it properly; cupping should be done by one who is experienced and he or she should use instruments that are properly cleaned and sterilized. The cupper must also ensure that no blood reaches the stomach of the patient.
We ask Allaah to help us and you to follow the Sunnah. May Allaah bless our Prophet Muhammad.
See: Fath al-Baari by Ibn Hajar, 10/149; Sharh al-Zarqaani ‘ala al-Muwatta’, 2/187; al-Mughni by Ibn Qudaamah, 1/184; al-Ma’aad by Ibn al-Qayyim, 4/