Suggest Natural Remedy For Alopecia Areata Causing Severe Hair Loss

Hello, I am facing problem with my scalp, alopecia areata this is what the name i found for my problem. Small smooth sparts forming. I am afraid of loosing my complete hair. Day by day small sports getting more. I read from a web site applying onion Juice will give me my hair back. Can you suggest any natural process i don't want to go with medicines.