Skin allergies are among the most common reasons people visit a dermatologist — and yet, they’re often misunderstood or ignored until they cause significant discomfort. From redness and itching to rashes and swelling, allergic skin reactions can vary from mild irritation to chronic, recurring conditions that affect daily life. In this detailed guide, Dr. Lipy Gupta, a leading dermatologist in Delhi, explains everything you need to know about skin allergies — their causes, types, diagnosis, and effective treatment options. What Is a Skin Allergy? A skin allergy occurs when your immune system overreacts to a harmless substance that comes into