Tight hats make your hair fall out.
Not true. Tight hats might restrict blood supply to the scalp but only by a minimal amount. Whatever the cause of hair loss, hats have no effect on the condition.
Too strong a shampoo causes hair loss.
Not true. Shampoo is merely a soap for cleaning the hair shaft and has no effect upon hair growth. The hair growth cells are 3-4 mm under the skin and cannot be affected by ordinary shampoos or conditioners.