I’ve been using regular TRESemme shampoo for the last few days. Throughout that time, I’ve only had a few intense itching spells, but relatively few and far between. By now, on the fourth day, using Neutrogena’s “Stubborn Itch Control” T-Gel seems to be especially effective.
I have found that using T-Gel sparingly, with about two days in between each use, helps to keep the psoriasis at bay long term. This level of frequency is also what the directions on the bottle advise. Also, using T-Gel too much causes my scalp to become excessively sensitive to sunlight, which is not a good idea since sunlight can be one of the most effective anti-psoriasis treatments.
As another informal observation, it would seem that using T-Gel too often can cause the psoriasis on my scalp to become accustomed to the effects of the active ingredient (coal tar, or “Neutar”) thus minimizing the shampoo’s effectiveness and maximizing the negative effects that it can have on the rest of my scalp, which is healthy for the most part.