Any moms on here pediatric moms or know a women who is... Each time I had my daughter she had…

Any moms on here pediatric moms or know a women who is... Each time I had my daughter she had thinning stop on her head almost blad.. Her father said first one was a fungus and second one pointed out to him was not using a gentle enough shampoo.. I'm just wandering is he telling me the truth or just avoiding taking her to the doc to find real answer idk how first one looked at first but the second spot had no pealing or redness or anything just a thin spot...