Help!? Anyone knows what this could be??

This appeared in my daughter head like a patch of her hair gone. Now it’s spreaded in other places in here head. Took her to the doctor and they said it’s ringworm or alopecia. I take care of my daughter hair. They gave me shampoo for ringworm and I wash it twice a week but the patches of hair loss is still spreading in her head and now it’s doing my other daughter hair the same way so I dont think it’s alopecia. They don’t use the same comb there bed sheets are clean and my house is always clean I don’t know what’s going on.