I got dry and itchy skin during winter. Now, I get red itchy spot on my skin, but only a few on arm, leg and my body. What is the diagnosis?

Lubricate. High doses of marine fish oil and/or coconut oil can help lubricate from the inside, not just outside. Please avoid lotions w/alcohol in them because they are drying. Winter is high season for dry skin. Check with a dermatologist for a diagnosis. Peace and good health.