Please recommend a good scalp care product for dyed hair.

I dye my gray hair periodically.

I do. I'm not doing any separate scalp care, but my hair is getting stiff and it's not good. However, because of my gray hair, I'm in a situation where I have no choice but to do it even if it's bad.

Maybe it's because of the heat these days, but my scalp is itchy too.

My hair isn't in good condition, so I want to know about good scalp care for dyeing.

Is there a good way?

I currently use three different shampoos and rotate them depending on my condition, but they don't really help with scalp care after dyeing.

Please recommend a good product for itchy and sensitive scalp care after dyeing.

Please let me know if anything, like shampoo or anything else, can be of help.

If you have any tips, please share them.