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.
Dandruff and dry scalp are terms that are often used interchangeably, but these two conditions aren't one and the same. While dandruff flakes are dry, the condition itself is not caused by dry skin. Knowing the difference between dandruff flakes and a dry scalp can help you determine when to see a doctor for the right treatment.