When should you see a doctor about persistent itching?

Itching may come from dry skin, eczema, allergy, infection, medicines, liver or kidney problems, or irritation from products. It can also occur with some blood and immune conditions. Most people with atopic dermatitis notice intense itching, while itching in other conditions may occur with a rash, night sweats, swollen glands, or changes in blood counts. Itching alone does not identify lymphoma or another cancer.

Describe where the itching began, whether it is local or widespread, what the skin looks like, and whether heat, bathing, clothing, or medicines affect it. Mention recent travel, new products, and any cancer treatment or transplant history.

Take photographs of a rash when it is visible and note new soaps, creams, medicines, or foods. Use gentle fragrance-free moisturiser, keep showers warm rather than hot, and keep nails short to reduce skin injury. Avoid applying steroid or antiseptic creams for prolonged periods without advice. Bring your medicine list and describe sleep loss, bleeding from scratching, or signs of infection.

Seek emergency help for itching with swelling of the lips or tongue, breathing difficulty, faintness, or a rapidly spreading blistering rash. Seek prompt care for yellowing skin, dark urine, fever, pus, painful redness, extensive peeling, or itching that begins soon after a new medicine or cancer treatment. After a transplant, report a new rash or widespread itch to the treating team because Graft-Versus-Host Disease needs assessment.

Ask whether the skin needs examination, whether blood tests could look for an internal cause, and which treatments are suitable for your pattern. Ask how to protect scratched skin and when to return. If itching is widespread or accompanied by swollen glands or night sweats, ask whether conditions such as Cutaneous T-Cell Lymphoma or Hodgkin Lymphoma need consideration.