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Author: Tariq Reviewed & Sources: WHO, CDC, dermatology textbooks Last Updated: April 2026 What is Atopic Dermatitis? Commonly known as Eczema, this is a chronic inflammatory skin condition that causes the skin to become red, intensely itchy, and irritated. The "Atopic Triad": It is heavily influenced by genetics and is closely linked to two other hyper-reactive immune conditions. If you have eczema, you are at a significantly higher risk for developing: Asthma . Hay Fever (Allergic Rhinitis) . Symptoms The hallmark symptom of eczema is severe, relentless itching, which is notoriously worse at night. The appearance of the rash changes depending on the patient's age: In Infants (Infantile Eczema) Location: Usually appears on the face, scalp, and the front of the legs. Appearance: A red, weeping, or oozing rash that eventually crusts over. ...

What is Scabies? Scabies is an intensely itchy, highly contagious skin condition caused by a microscopic, eight-legged burrowing mite called Sarcoptes scabiei . The severe itching occurs precisely where the mite burrows into the upper layer of the skin to live and lay its eggs. Because it spreads so quickly through prolonged, close physical contact, doctors routinely recommend treating entire families or household contact groups simultaneously to completely eliminate the infestation. Symptoms The absolute hallmark signs of scabies are severe, unrelenting itching (which is notoriously much worse at night) and thin, irregular burrow tracks made of tiny bumps or blisters on the skin. Where does it typically appear? The mites prefer warm folds of skin. In adults and older children , burrows are most commonly found: Between the fingers and toes. In the armpits and around the waistline. On the inner wrist...

What is Diaper Rash? Diaper rash is a very common form of inflamed skin (dermatitis) that appears as a patchwork of bright red, irritated skin on your baby's bottom. It is usually linked to continuously wet or infrequently changed diapers, skin sensitivity, and chafing. While it can be alarming for parents, most cases resolve quickly with simple at-home treatments and improved diapering habits. Symptoms Diaper rash is primarily characterized by the following clinical signs: Skin Appearance: Red, puffy, and tender-looking skin on the buttocks, thighs, and genitals. The rash may be localized or spread across the entire diaper area. Behavioral Changes: You may notice your baby seems more uncomfortable than usual, particularly during diaper changes. They may fuss or cry when the diaper area is washed or touched. When to See a Doctor While most diaper rashes are mild, you should consult y...

What is Dermatitis? Dermatitis is a general medical term used to describe inflammation of the skin. It typically involves an intensely itchy rash appearing on swollen, reddened, or dry skin. It is a very common condition that is strictly non-contagious , meaning you cannot catch it from or give it to someone else. However, chronic flares can be physically uncomfortable and cause significant self-consciousness. Common forms include Eczema, Seborrheic Dermatitis (Dandruff), and allergic contact rashes. Common Types & Symptoms Because "dermatitis" is a broad umbrella term, your specific symptoms will depend entirely on the type you are experiencing: 1. Atopic Dermatitis (Eczema) Usually beginning in early infancy, this is a chronic condition. It typically appears as a red, itchy rash in areas where the skin flexes—such as the inside of the elbows, behind the knees, and the front of the neck. If the area is scr...

What is Frostbite? Frostbite is a serious medical condition that occurs when the skin and the underlying tissues physically freeze. It typically affects extremities that are furthest from the body's core, like the fingers, toes, nose, ears, cheeks, and chin. Frostnip is the early, superficial stage (causes irritation but no permanent damage). Frostbite is the advanced, dangerous stage (tissue freezes, crystalizes, and may die). Stages & Symptoms Frostbite progresses in three distinct stages. Because the affected area quickly becomes numb due to the cold, you may not even realize you have it until someone else points out the discoloration. 1. Frostnip (Mild) Appearance: Skin turns red and feels very cold to the touch. Sensation: Prickling, stinging, and numbness. Outcome: No permanent damage. Sharp pain and intense tingling will occur as the area warms up. 2. Superficial Frostbit...

What is Dandruff? Dandruff is a highly common, chronic scalp condition marked by the rapid flaking of dead skin cells. It is not contagious and is rarely a serious medical issue, though it can be intensely frustrating and embarrassing. While it is often mistakenly blamed entirely on "dry skin," dandruff is actually most frequently caused by excess oil production or an inflammatory reaction to a naturally occurring scalp fungus called Malassezia . Symptoms Symptoms are often noticeably worse during the dry, cold winter months (due to indoor heating) and tend to improve during the humid summer. Signs include: White, sometimes oily-looking flakes resting on the hair, eyebrows, and shoulders. An intensely itchy, scaly scalp. Mild redness or inflammation on the scalp. In Babies: Cradle Cap In newborns and infants, this same condition is called Cradle Cap (infantile seborrheic dermatitis). I...