Define the rub: something that causes a difficulty or problem â the rub in a sentence something that causes a difficulty or problemâ¦ See the full definition
Knowing the difference between lice and dandruff can help heal your scalp condition properly. Lice are infectious parasites and dandruff is a self-contained scalp condition. Dandruff comes from the head, and flakes off. Dandruff is due to the excessive shedding of dead skin cells from the scalp, and lice are wingless insects (small bugs) that infest the hair and scalp. The methods of prevention and treatment also vary between lice and dandruff.
1 Head lice are tiny insects that live on the scalp, usually on children aged 10 and under. 2  Head lice have six legs, each with a curved claw that can tightly grasp hair.  They can move easily between hairs (at a rate of 23 cm per minute), but cannot fly or jump.