Raiyani onion hair mask is a type of DIY hair treatment that is made using the juice of an onion. Onions are rich in sulfur which is known for promoting hair growth, strengthening hair, and reducing hair thinning. Onion juice is also believed to have antimicrobial properties, which can help to reduce scalp infections and dandruff. To make an onion hair mask, you can blend an onion and strain the juice. Mix the juice with equal parts of carrier oil such as coconut oil or olive oil and apply the mixture to your hair and scalp. Leave it on for 15-20 minutes before rinsing it out with warm water. You can also add other ingredients such as honey, yogurt, or egg yolk to provide additional moisture and nourishment to the hair. It's recommended to use an onion hair mask once a week for best results.