The salts from the sweat after a workout remain on your scalp and can dry out the shaft of your hair, creating a dry, itchy feeling. The moisture accumulated on your scalp feeds bacteria which can be the smelly kind you have in the underarm region.
Additionally, sweat can clog the hair follicle leading to further irritation and an itchy sensation. Moisture from sweat can damage the hair as it also makes it more prone to breakage when hair is wet.
Not everyone has the time to shower or wash their hair after a workout, making dry shampoo an excellent choice to eliminate the odor. As a developer of a natural dry shampoo, here is how to use it to prevent a dry itchy scalp.