Dirt and sweat
Dr. Shainhouse explains that when you don’t tend to wash your hair often enough, dirt, its natural oils, sweat, and product residue buildup forms, causing you to scratch a lot. Bear in mind that the skin of your scalp is quite similar to the skin of your face. Now… imagine how your face would feel if you wouldn’t wash it for two weeks.
And now you may ask, “how often should I wash my hair?” however, there’s no universal answer. Some people may need to wash it every other day, while others are fine keeping it unwashed for a whole week. If you go to the gym on a regular basis, it’s best to wash your hair after an intense day, as sweat can irritate the scalp, making you scratch a lot.
