Itching (Pruritus): Causes, Medications & What Really Helps
It itches on the arm, the back, all over the body — and scratching only makes it worse. Itching (medically: pruritus) is one of the most distressing symptoms there is. The causes range from dry skin and allergies to internal conditions. What many people don't realise: numerous medications can trigger itching — with or without a visible rash. Antibiotics, blood pressure medications, and painkillers are all on the list of possible culprits.
Review your medications: Are you taking a new antibiotic or painkiller? Itching can be a drug reaction — speak to your doctor.
EMERGENCY: Anaphylaxis → call 999 immediately!
If itching occurs together with difficulty breathing, swelling of the face or throat, circulatory problems, or an extensive rash with blistering — call 999 immediately. These are signs of a severe allergic reaction (anaphylaxis).
2. Understanding Itching — What Happens in the Skin?
Itching occurs when certain messenger substances — primarily histamine — irritate nerve fibres in the skin and send a signal to the brain. This reflex originally served a purpose: removing parasites or irritants from the skin. With chronic itching, this system goes out of control.
Itching with vs. without visible skin changes
Medically, a distinction is made between itching with a visible rash and itching without any visible skin changes. The latter is harder to diagnose — the cause is often an internal condition, nerve disorder, or medication. When itching lasts more than 6 weeks, it is called chronic pruritus — affecting around 13–17% of the population.
3. Common Causes of Itching
3.1 Medications — a frequently overlooked cause
Only in half of cases does medication-induced itching come with a visible rash. Particularly tricky: sometimes a medication has been taken for months before a reaction develops.
Cause itching in 60–90% of patients, especially with epidural administration
Table scrollable to the right
3.2 Dry skin (xerodermia)
The most common cause of itching — especially in winter, with central heating, frequent hot showers, or in older age. Medications that dehydrate the body (diuretics such as torasemide, antihistamines) can also worsen skin dryness.
3.3 Allergies and skin conditions
Eczema (atopic dermatitis), contact allergies (nickel, fragrances, latex), urticaria (hives), psoriasis, and other forms of eczema almost always present with visible skin changes.
3.4 Internal conditions
Itching without a rash can point to internal conditions: liver disease (bile stasis — typically itching on the palms and soles), kidney failure (affects up to 40% of dialysis patients), diabetes, thyroid disorders, iron deficiency, and in rare cases lymphoma.
3.5 Psychological itching
Stress, anxiety, and psychological burden can trigger or worsen itching — even without any skin changes. Chronic stress lowers the itch threshold and makes the skin more sensitive.
4. What Helps Against Itching?
Immediate measures
Cooling is the most effective immediate measure: a cold flannel, ice pack in a cloth, or a cooling gel with menthol. Do not scratch — instead pat the area or stroke it with the flat of your hand. Black tea compresses (2 bags, left to cool, applied for 10–15 minutes) — the tannins have anti-inflammatory and itch-relieving properties.
Long-term skincare
Moisturise daily with a rich, fragrance-free cream — especially after showering on still-slightly-damp skin. Shower briefly and at lukewarm temperature (max. 5–10 minutes). Use a mild, pH-neutral wash lotion. Maintain room humidity at 40–60%. Wear cotton or silk clothing.
Medications for itching
Cetirizine and loratadine are the standard treatment for allergic itching. Cetirizine is stronger but causes drowsiness in around 10% of users — loratadine is the less sedating alternative. For severe, localised itching, low-potency corticosteroid creams (e.g. hydrocortisone 0.5%) can help in the short term.
For medication-related itching
Never stop on your own. Speak to your doctor — they can identify the triggering medication, adjust the dose, or switch to an alternative. In most cases itching resolves 1–2 weeks after the trigger is stopped.
5. Could Your Medication Be the Cause?
Digital medication plan: Record all your medications — your doctor can immediately spot potential itch triggers and check the timing.
Interaction check: Some combinations increase the risk of allergic reactions.
Dose reminder: Antihistamines only work reliably with consistent daily intake — brite reminds you.
Antibiotics (especially penicillins such as amoxicillin), ACE inhibitors (ramipril), beta-blockers, NSAIDs (ibuprofen, diclofenac), and opioids. Itching can occur with or without a visible rash.
Yes, and this is actually quite common. Itching without visible skin changes can point to medication side effects, liver or kidney disease, thyroid problems, or iron deficiency. Always have the cause medically investigated.
Cooling is the most effective immediate measure: a cold flannel, ice pack, or gel with menthol. Do not scratch — pat instead. For allergic itching, cetirizine or loratadine help.
Paradoxically, yes. Cortisone is used to treat itching but can trigger massive rebound itch when stopped — especially after prolonged use. Always taper gradually, never stop abruptly.
Yes. Psychological stress lowers the itch threshold and makes the skin more sensitive — even without any visible skin changes. Relaxation techniques and stress management can help.
When itching occurs together with difficulty breathing, swelling of the face or throat, and circulatory problems — these are signs of anaphylaxis. Call 999 immediately!
Sources
Weisshaar E et al.: European guideline on chronic pruritus. Acta Derm Venereol 2019
British Association of Dermatologists: Chronic pruritus — patient information (2022)
Patel T et al.: Pruritus as a systemic disease. Arch Dermatol 2011
brite App: Anonymised user data, as of February 2026
Medical disclaimer: This page is for general informational purposes only and does not replace medical advice. For persistent itching, severe skin reactions after taking a medication, or signs of an allergic reaction, please seek medical help immediately. Last updated: February 2026.
Anaphylaxis warning: Itching + difficulty breathing + swelling of face/throat + circulatory problems → call 999 immediately!
