Having a sore and itchy scalp can be a complete pain, as the irritation is distracting and at times all-consuming - however ...

A beauty writer tests Olaplex's No.0.5 Hydrating and Strengthening Scalp Serum for two weeks on her dandruff-prone scalp.

Medically reviewed by William Truswell, MD Scalp pain or tenderness can have a variety of causes including trauma, psoriasis, ...