In my own experience I use aloe vera for my scalp problems. The dead skin cells causes my scalp to be itchy and have dundruff in it. I used aloe vera 2-3 times in a week. I wiped the gel in my scalp and leave for few minutes, then bath. After all the procedure I can feel relief and my scalp isn't itchy anymore. It can also be used as conditioner leaving the hair shinny.
It really helps with those who has skin problems and I even use it to moistened my face too. But I don't advice to those who has skin allergies, because sometimes it causes burning sensation, redness and itchyness on skin.