We have tried to brief on clinical treatments for hair loss below:

Medication: if it's some hormonal disorder or genetic predisposition.
One treatment which doesn't require prescription, and what we can suggest is - Minoxidil: which comes in liquid, foam and shampoo forms, same is to be applied on the scalp skin once everyday for women and twice regularly for men. It might take a few months for you to be able to tell whether the treatment is working or not, and if it does then you can continue using the medicine to retain benefits. Possible side effects however include scalp irritation and unwanted hair growth on the adjacent skin of the face as well as hands.

Hair transplant surgery: While undergoing this procedure, a dermatologist or cosmetic surgeon removes hair from that part of your head which has hair and transplants it to a balding region. Each patch of hair has one, few, or several hair strands. Sometimes a larger strip of skin containing multiple hair groupings is taken. You won't be hospitalized for this, but it is painful so you'll be given a sedation medicine. Possible risks you may run into bleeding, bruising, swelling and infection. You may need more than one surgery to get the desired effect. But if you hair loss was hereditary, then it will eventually progress despite this surgery.

Laser therapy: Not researched extensively but some studies have claimed that it can be beneficial.
Lifestyle fixes: such as shampoo/conditioner/oil with those ingredients which are specific to your hair and skin type, or diet changes and exercise schedule will be planned, or may be some effective hair spray.
You can start with minoxidil for now, but if it doesn't work then please approach a specialist, for your convenience, we are also linking our page which might help you out - Hair Loss Treatment doctors in Mumbai, do tell us if you require list based on a different region, and also, you can approach us anytime you have doubts!