If your hair is falling out because of a quick weight loss how long will that last? its been a month already

6 weeks minimum: That is called a telogen effluvium, and it will take a minimum of 6 weeks for the hair bulbs to recycle and start growing again. Then it will take another few months for the hair to regrow completely. I feel your pain; it happened to me once, and while i knew what it was, and i knew that it would grow back, it still freaked me out. Try not to worry; losing that weight is worth it.

Weight loss: Hair should return. You should be careful about crash, starvation diets. https://www.thedocstu.com/blog/wellness-consultant