Mine does this, it's chronically dry and when I use sulfate shampoo too much I get a few bumps (that pop, ewww!)
What has saved me is strictly no sulfates and using a tea tree option once in a while. I use Nature's Organic (god now I feel like that's wrong and I am not near my own bathroom). It's sulfate free and really nice.
I also recently bought Kiss My Face Every day (or every time) daily shampoo for my BF and have tried it. No sulfates (I think) and the coco betaine is way down the list after a lot of natural extracts and aloe and such. I really like it and this may become my winter wash.