Does anyone knows why when I dye my hair fluid comes out of my scalp?

I went to get my hair retouched this weekend and for some reason after the hair session some sticky water starts coming out of my scalp this is usually a couple of hours later and it gets hard like a scab. when the hair color its in process I feel like it burns so I’m guessing is irritation? Is it dangerous? I’ve been dying my hair for over ten years but this recently started to happen. Perhaps I should change hairstylist?