What to do at home if women's hair falls out?

There are many reasons for baldness.
First, try to remember if there have been any stressful situations in your life for three or four months (well, in general, not yesterday 😅). It could be an illness, the loss of a loved one, problems at work or in personal life, sudden life changes, etc. - such stress does not pass without a trace for the body and hair can often fall out. If the cause of the stress is removed, the hair will return.
Secondly, it can be hereditary. If mom, for example, started to lose hair early.
Thirdly, a billion reasons that only a trichologist can help to find by prescribing an examination and tests. In the previous case, you should also see a doctor, he will help you understand what exactly is the impetus for baldness.
Fourth, go to the doctor, do not waste time in blind attempts to do something at home.

Try using folk remedies. Such as onions, you can make hair masks from it. You can also make a tincture or a decoction of nettle. In combination with folk remedies, it would be good to take vitamins and supplements.