Hair loss started after severe dieting and after weight loss. Can I go for minoxidil? (photos)

It is well known that losing a lot of weight suddenly can cause hair loss known as telogen effluvium. This type of hair loss can be seen after any trauma such as a long surgery, pregnancy, or severe emotional distress.  It is reversible assuming the circumstances that caused it resolve but it can take several years to recover.   From your two photos, one shows the hair pulled back and dark, the other is not pulled back and appears lighter so it is difficult to compare the two photos. It is always a good idea to visit with a dermatologist who knows about hair so they can evaluated you completely and make sure there isn't any other factors contributing to your hair loss.

Minoxidil I always good to try out an see if the quality of your hair improves. Weight loss and hair loss is a known connection and it might b wise to also evaluate with a doctor to see if you also have a genetic component  

Weight loss and extreme diet is a known cause of hair loss. Minoxidil may help, but see a good doctor and get more insights into your problem as it may have a genetic component.