Scalp is skin, but a much more complex one.
Sebum oxidation and micro cracks on the scalp surface can create numerous issues. It’s a vicious cycle and you want out.

Wet your hair thoroughly with warm water. Apply a small amount of shampoo to your scalp and hair. Massage your scalp with your fingertips for 1-2 minutes. Rinse your hair thoroughly with warm water. Repeat the process if necessary.