“Essentially, it is a temporary hair loss from excessive shedding due to a shock to the system. There are several common triggers, such as surgery, major physical or psychological trauma, any kind of infection or high fever, extreme weight loss or a change in diet. Hormonal changes, such as post-partum or menopause, can also be a cause.
https://consultqd.clevelandclinic.org/covid-19-related-hair-loss/

