A native to south and southwest Asia, the seeds of the Fennel flower (Nigella sativa) or black cumin, as it is often called, is one of the most revered medicinal plants/seeds in history.
One of black cumin’s most popular and effective uses is the treatment of diseases related to the respiratory system: including asthma, bronchitis, rheumatism and cold symptoms. The seeds help increase body tone, stimulate menstrual period, and increase the flow of breast milk in nursing mothers.
Black cumin seed oil helps calm the nervous system, quells colic pain, stimulates urine production, helps treat pertussis, improves digestion and helps prevent and lower high blood pressure.
The seeds are very effective in curing abscesses and tumors of the eye, abdomen and liver, probably due in great part to the anti-tumor compound beta-sitosterol found in the seeds.
Black cumin seed helps stimulate energy and helps in recovery from fatigue and low spirits. It is also an effective cure for skin conditions such as allergies, eczema, acne, psoriasis and boils. It is anti-parasitic and helps in the treatment of flatulence, diarrhea, hemorrhoids, constipation and dysentery. [source]
Although most formal research and studies of Nigella sativa benefits were conducted recently, this amazing botanical has already been used and mentioned in the hadith. Here is one from Sahih al-Bukhari (5687):
Narrated Khalid bin Sa`d:
We went out and Ghalib bin Abjar was accompanying us. He fell ill on the way and when we arrived at Medina he was still sick.
Ibn Abi ‘Atiq came to visit him and said to us, “Treat him with black cumin. Take five or seven seeds and crush them (mix the powder with oil) and drop the resulting mixture into both nostrils, for `Aisha has narrated to me that she heard the Prophet (ﷺ) saying, ‘This black cumin is healing for all diseases except As-Sam.’
Aisha said, ‘What is As-Sam?’ He said, ‘Death.”
However, when buying black cumin seed oil, one should check the labels and product information carefully. Black cumin is commonly referred to as black seed oil, black onion seed, black caraway, black sesame seed, and other names, but only Nigella sativa is true black cumin.