Wearing hats causes hair loss
In order for the hair to fall out, the hat would have to be so tight that it cuts circulation to the follicles. So no, wearing hats does not cause hair loss. Could you just imagine how many pro sports players would be bald if that were the case?

Losing a handful of hair daily is a sign of male pattern baldness
If you have male pattern baldness, then yes, you'll lose a lot of hair each day. On the other hand, if you don't have male pattern baldness, it can be normal to lose that much hair because it will grow back. Only time will tell, and you should wait and see if it does indeed grow back.

Excessive use of hair products causes hair loss
There are no hair care products that cause hair loss. You may sculpt your locks with as much gel, mousse or spray as you desire.

Standing on your head cures hair loss
The idea is that, by standing on your head, blood flow will be increased and your scalp will be regenerated. Specialists agree on the fact that it has no influence on hair loss at all; follicles need more than blood flow to grow hair.

Brushing your hair is better than combing it
Actually, your hair reacts better to a comb than a brush. Brushing it will only lead to split ends and hair breakage, not to male pattern baldness.

Cutting your hair will make it grow back thicker
This common misconception comes from the fact that hair is thicker at the base than it is at the tip, so it appears thicker at first. Cutting your hair does not affect hair growth at all; it will grow about half an inch each month no matter what.