Adhere to at least the recommended minimum servings of oily fish which for *most* people is much more and the recommended maximums of sugars and white carbs which for *most* people is much less, as I said look at your intake. Sugar and white carbs are highly inflammatory, omega-3s from oily fish powerful anti inflammatories.
It is a lot of changes so by all means take baby steps, unfortunately they do work together so you might not get magical results right away. Dermatitis is an inflammatory (suffix -ITIS) condition and many aspects of the modern western lifestyle do act together to cause inflammation or irritation. Genetics can also be part of the puzzle but of course that aspect we cannot change.
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
Treatments: Komaza protein, Komaza Matani, coconut oil with sugar syrup. Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume
Styler: Umberto Giannini jelly, Boots curl creme, Rockin RInglets
Experimenting with: Mega-Tek, Curl Harmony reviver, Elvive Full Restore 5.