You can heat up vegetable oil in the microwave for 30 seconds and apply it first to your part in your hair then massage through out your your scalp. Afterwards you leave it in for an hour to an hour and a 1/2 and wash it out.. but BEFORE you wash it out flip your hair over like you're bending over to pick something up. Do this for 4 minutes and it will send blood flow to your scalp helping the hair grow. It wont grow instantly but if you repeat this everyday for 2 weeks it is said to help your hair grow 2-4 inches :D Hope I helped!
You need to eat healthier first if you want your hair to grow fast and healthier ! And there are some treatment you can do to your hair that will help grow, but you need to write down what you need to put and what you don't need to put because everyone had different hair types . And take care of your body too because eating good and do exercises your hair will respond and you skin TOO ! There is a really known recipe that will help you and i'm gonna share it with you and hope it will work on you :
1 tablespoon honey
1 /2 tablespoon olive or coconut oil
1 tablespoon dried sage (helps reduce hair loss)
10 tablespoons mineral or regular clean water
Combine the above ingredients and massage the mixture into the scalp for about 2 – 3 minutes.