This might seem like too simple of an answer, but have you tried changing your shampoo? I generally use Redken's Allsoft everyday, and when I switched to Dove for a few days, my head itched like nobody's business!!! I thought I was gonna lose my mind. I ended up giving myself scabs from scratching.
Another thing you can do is pick up a bottle of Braid-X. I used to get my hair braided with extensions (ala Jane Child) and a few sprays of that stuff would calm the itching and irritation from the knots. It also has a lot of natural oils which might help sooth your scalp.
Edit - I don't think Braid-X is around anymore. You can find braid spray at walmart in the ethnic hair care section or at Sallys, for much cheaper than what you're paying for the scalpicin.
Another thing you can do is pick up a bottle of Braid-X. I used to get my hair braided with extensions (ala Jane Child) and a few sprays of that stuff would calm the itching and irritation from the knots. It also has a lot of natural oils which might help sooth your scalp.
Edit - I don't think Braid-X is around anymore. You can find braid spray at walmart in the ethnic hair care section or at Sallys, for much cheaper than what you're paying for the scalpicin.