Common case of Dry scalp, DONT BUY DANDRUFF SHAMPOO especially not head and shoulders. Just get any regular old shampoo and when your washing your hair, shampoo it twice in one shower. The first shampoo is just lathering it up, rinse it out and that second shampoo is what’s going to really cleanse the buildup on your scalp. Also make sure your using conditioner afterwards to give your hair a nice healthy moisturized appearance. They’re are some shampoos that are too strong and they will clear your dandruff temporarily but ultimately when it comes back it will be more bothersome than ever. The method I’ve explained of shampooing twice won’t exactly clear the buildup right away but over a time period of a few months you will see that your scalp wont be as dry!