If your hair has thinned out following acute depression and severe dandruff, you will first need to eliminate those conditions. In order to eliminate dandruff, you can begin by adding a few drops of tea tree oil to your regular shampoo and using it as usual. This should help clear up your dandruff within a week or so. If the problem is chronic, you may have to follow a daily procedure of applying warm olive oil to your hair, leaving it on overnight and washing it off the next morning for a couple of weeks. Before you wash it off, you can also rub in half a lime in your scalp and leave it for half an hour. Do remember that this will cause serious itching, as that is the sensation of the lime loosening the dandruff.
If you were suffering from depression for a long time, you need to give yourself a while to recover from that as well. You hair will grow back, although it may not grow back as generously as what it was before you lost it. To remedy this situation, you can apply the juice of freshly grated onions to your scalp, leave it on for about 15 minutes and wash with plain water. Shampoo after an hour or after your hair dries. Soak fenugreek seeds in water overnight. Massage the water into the scalp next morning and leave it on for about three hours and rinse. Following this process for a month.
answered by G R