DIAGNOSIS: This happens when the air intake grille (the holes near the handle) doesn't have its protective filter in place, or when the filter is clogged and creating more suction through the gaps around it.
FIX: First, check that the black foam filter is correctly seated inside the circular air intake. If it's missing, you can order a replacement from Revlon. If it's present, remove it and clean it by rinsing under water (let it dry COMPLETELY before reinstalling). A clean filter reduces suction strength and prevents hairs from being pulled into the mechanical parts.
IF THAT DIDN'T WORK: Your technique might be contributing. Avoid holding the dryer directly against your scalp or tangling the bristles deeply into thick sections. Use a brushing motion that keeps the barrel moving.
HEADS UP: Never use the dryer without that foam filter. It's a critical safety part that prevents major hair tangles and protects the fan. Also, regularly cleaning the filter is a must for performance and hair safety.