What should you know about itching under the skin?

A deep, prickling, crawling, or tingling itch may occur even when the surface looks normal. Dryness can weaken the skin barrier and make ordinary sensations feel irritating. Eczema and contact dermatitis can cause itch before redness or scaling becomes obvious; atopic dermatitis is often intensely itchy. A fungal or yeast-related problem may be more likely when there is moisture, scaling, cracking, or a defined border. Scabies often causes intense itch that is worse at night and may affect close contacts. Nerve irritation can cause a focused itch with burning, pins-and-needles, or altered sensation.

The location, timing, new products, household symptoms, and any visible change help a clinician narrow the possibilities. An itch is a symptom, not a diagnosis.

Use a fragrance-free moisturiser regularly, especially after a lukewarm wash, and choose loose breathable clothing. Keep nails short and use a cool compress instead of scratching; repeated scratching can break the barrier and invite infection. Pause recently introduced soaps, detergents, cosmetics, or topical medicines if the itch began after using them. Do not share towels or bedding if scabies or a contagious skin problem is possible. A pharmacist or clinician can advise which treatment is suitable for the body area and your medical history; avoid starting prescription creams or oral medicines without guidance.

Arrange medical advice if the itch persists, spreads, disrupts sleep, or has no clear skin trigger. Seek prompt care for swelling of the lips or tongue, breathing difficulty, widespread blistering, fever, pus, rapidly worsening pain, or skin that becomes hot and red. An itch with yellowing of the eyes or skin, dark urine, or marked tiredness also needs assessment. A clinician may inspect the skin and nails, review medicines and exposures, and decide whether tests are needed.

When did the sensation begin, where is it strongest, and is it worse at night or after heat? Could a new product, medicine, or exposure be involved? What signs would suggest eczema, infection, scabies, or nerve irritation? Which moisturiser or anti-itch option is appropriate for me, and how long should I try it?