In Urdu, black seed oil is commonly known as "Kalonji ka tel" (کلونجی کا تیل).

Black seed oil, also known as black cumin seed oil or nigella sativa oil, is extracted from the seeds of the Nigella sativa plant, which is native to Southwest Asia.

Black seed oil contains antioxidants and bioactive compounds. It may benefit skin and hair health.

Following are the benefits of using Blackseed oil on Skin or Hair:

1. Some research shows that black seed oil could benefit skin conditions such as acne. 
2. Thanks to its antimicrobial and antioxidant propertiesTrusted Source, black seed oil is often added to hair care products, including hair masks and shampoos. Though many of these products claim to improve the shine, strength, volume, and texture of hair, there is very little research on the benefits of black seed oil for hair health.
3. StudiesTrusted Source have shown that black seed oil has powerful anti-inflammatory properties.
4. Several studies have found that black seed oil could alleviate symptoms of eczema, a skin condition characterized by dry, itchy skin.

Ref: (https://www.healthline.com/health/food-nutrition/black-seed-oil-benefits#eczema)

For Skin:

1. Moisturizer: After cleansing your face, apply a few drops of black seed oil directly onto your skin and massage gently. It can help moisturize dry skin and leave it feeling soft and supple.
2. Acne Treatment: Black seed oil has antibacterial and anti-inflammatory properties that may help reduce acne. Apply a small amount of oil to affected areas after cleansing, and leave it on overnight. Rinse off in the morning.
3. Anti-Aging Serum: Mix a few drops of black seed oil with your favorite facial serum or moisturizer to boost its anti-aging effects. Apply to your face and neck daily to help reduce the appearance of fine lines and wrinkles.
4. Spot Treatment: For specific skin concerns such as dark spots or scars, apply black seed oil directly to the affected area and massage gently. Repeat regularly for best results.

For Hair:

1. Scalp Treatment: Massage black seed oil directly onto your scalp to help nourish hair follicles and promote healthy hair growth. Leave it on for at least 30 minutes before washing your hair as usual.
2. Hair Mask: Mix black seed oil with a carrier oil such as coconut or olive oil to create a nourishing hair mask. Apply the mixture to your hair from root to tip, focusing on dry or damaged areas. Leave it on for 1-2 hours before shampooing.
3. Frizz Control: Rub a small amount of black seed oil between your palms and smooth it over your hair to tame frizz and flyaways. This can also help add shine and moisture to dry, dull hair.
4. Split End Treatment: Apply a few drops of black seed oil to the ends of your hair to help prevent and repair split ends. This can help keep your hair looking healthy and vibrant.

Always perform a patch test before using black seed oil, especially if you have sensitive skin or allergies. Additionally, it's important to use pure, high-quality oil and to avoid contact with the eyes. If you experience any irritation or adverse reactions, discontinue use immediately.

While mustard oil offers potential benefits for hair and skin, individual results may vary. Some people may experience skin irritation or allergic reactions when using mustard oil, especially if they have sensitive skin or allergies. It's important to perform a patch test before using mustard oil extensively and discontinue use if any adverse reactions occur. Consult with a dermatologist or healthcare professional if you have concerns or experience persistent issues.

Certainly, here are five frequently asked questions (FAQs) related to black seed oil for hair and skin:

1. Is black seed oil beneficial for hair growth? Yes, black seed oil is believed to promote hair growth due to its nourishing properties and high content of essential fatty acids. Massaging black seed oil into the scalp can help improve blood circulation to the hair follicles, leading to healthier hair growth. However, individual results may vary, and consistent use over time is often recommended to see noticeable improvements in hair growth.
2. Can black seed oil help with dandruff and scalp irritation? Yes, black seed oil is known for its anti-inflammatory and antimicrobial properties, which may help soothe scalp irritation and reduce dandruff. Massaging black seed oil into the scalp can moisturize dry skin, alleviate itching, and combat fungal infections that contribute to dandruff. For best results, apply black seed oil to the scalp regularly and leave it on for at least 30 minutes before washing your hair.
3. Does black seed oil help with acne-prone skin? Yes, black seed oil is beneficial for acne-prone skin due to its anti-inflammatory and antibacterial properties. Applying black seed oil topically can help reduce inflammation, soothe redness, and inhibit the growth of acne-causing bacteria. It also helps regulate oil production, keeping the skin balanced and less prone to breakouts. For best results, apply a small amount of black seed oil to clean, dry skin and leave it on overnight.
4. Can black seed oil be used to fade scars and dark spots? Yes, black seed oil may help fade scars and dark spots on the skin over time. It contains antioxidants and vitamins that promote skin regeneration and repair, helping to lighten hyperpigmentation and improve overall skin tone. For targeted treatment, apply black seed oil directly to the affected areas and massage gently in a circular motion. Consistent use is key to seeing results.
5. Is black seed oil suitable for all skin types? Yes, black seed oil is generally safe for all skin types, including sensitive skin, as it is non-comedogenic and unlikely to clog pores. However, individuals with sensitive skin or allergies should perform a patch test before using black seed oil extensively. If any irritation occurs, discontinue use immediately. Additionally, always choose high-quality, cold-pressed black seed oil free from additives or preservatives for the best results.