Itchy Skin Without a Rash: Possible Causes

Itchy skin without a rash is surprisingly common, especially in older adults. Dry skin is the usual culprit, but persistent itching all over can occasionally be a clue to something else going on in the body.

Imagine itching all over every night for weeks, with nothing to see on your skin. Moisturiser helps a little but not enough. A blood test shows an underactive thyroid. With treatment and a better skin routine, the itching settles and you sleep through again.

Common causes

• Dry skin: worse in winter, with hot showers, harsh soaps and ageing
• Medicines: such as opioids, some blood pressure tablets and statins
• Pregnancy: mild itching is common, but intense itching of hands and feet can signal obstetric cholestasis, which needs checking
• Liver disease: such as cholestasis
• Kidney disease
• Thyroid problems
• Iron deficiency
• Nerve problems, such as after shingles or with diabetes
• Anxiety and stress
• Rarely, blood cancers such as lymphoma

What helps

• Use a fragrance-free moisturiser generously, especially after bathing
• Take shorter, lukewarm showers and use soap substitutes
• Wear loose cotton clothing
• Keep nails short and try patting instead of scratching
• Use a cool compress

But when should I see a doctor?

See a doctor if itching lasts more than two weeks despite moisturising, affects your whole body, disturbs sleep, or comes with weight loss, night sweats, fever, yellow skin or eyes, or extreme tiredness. Blood tests can check liver, kidney, thyroid and iron. Pregnant women with itching should always tell their midwife or doctor.

Sources: American Academy of Dermatology, NHS (Itchy skin), British Association of Dermatologists, Royal College of Obstetricians and Gynaecologists (Intrahepatic cholestasis of pregnancy).