Talk to Dermatologist on Skin / Atopic Dermatitis

Two months ago, my skin became extremely dry to an extent that white flakes would fall off. I lost my sleep. My face became red and itchy. My arms were all red and hard to touch. My entire body became dry. I don't use soap, fragrance or any product on my skin. I kept wondering what might be causing it. I was fasting in Ramadan so I quit fasting. Ampled up my liquid intake, made sure I eat gut friendly food, applied simple mustard oil on my body to relieve the itching and dryness. My skin after 2 months is soft now but my face still has red patches and my arms too. They are not going away.