Lip scrubs, like most facial exfoliators, are designed for periodic use perhaps once or at most twice a week. As gentle exfoliating scrubs, they can be a vital part of a lip-care beauty any time of year, especially in winter months, to remove dead, dried stringy bits of skin. However, the skin on our lips is extremely thin and has only 3 to 5 layers while face skin has around 16. Lips are therefore prone to damage from over rigorous exfoliation. Use lip scrubs sparingly.