Why Won't My Itchy Skin Go Away? Common Causes and How to Stop the Itch
Itchy skin guide
Itchy skin that won't go away is most often caused by dry skin, eczema, contact dermatitis or a fungal infection, and it is kept going by the itch-scratch cycle. Less often, long-lasting itch comes from hives, scabies, medicines or an internal condition such as kidney, liver or thyroid disease. Moisturising, cooling the skin and avoiding triggers relieve most cases; itch that lasts more than six weeks deserves a check-up.
- Itch lasting more than six weeks is called chronic pruritus.
- Dry skin is the most common cause, especially in older adults and in dry or air-conditioned environments.
- Scratching damages the skin barrier and makes itch worse, so breaking the cycle is key.
- Across 24 randomised trials, Chinese herbal medicine improved itch scores in chronic pruritus.
What are the most common causes of itchy skin that won't go away?
| Cause | Clues | Learn more |
|---|---|---|
| Dry skin (xerosis) | Rough, flaky skin; worse in cold, dry or air-conditioned air and after hot showers | Moisturising routine |
| Eczema | Red, dry, itchy patches in creases; history of allergies | What is eczema? |
| Contact dermatitis | Rash where a product, metal or plant touched the skin | Contact dermatitis |
| Fungal infection | Ring-shaped rash, itchy folds or feet | Ringworm |
| Hives (urticaria) | Raised welts that come and go within hours | Hives and itch |
| Psoriasis | Thick, well-defined plaques with silvery scale | Psoriasis |
| Scabies | Intense night-time itch, between fingers and wrists; others in the home itchy | See a doctor or pharmacist |
| Medicines | Itch started after a new medicine | Ask your doctor or pharmacist |
For dry, itchy skin that gets worse in cold weather or with age, see winter itch and dry skin in older adults.
Can itchy skin be caused by an internal problem?
Yes. Chronic itch without an obvious rash can be linked to kidney disease, liver and bile-duct problems, an overactive or underactive thyroid, iron deficiency, diabetes, some blood disorders and nerve conditions (Yosipovitch and Bernhard, 2013). A doctor can check for these with simple blood tests if your itch has no clear skin cause.
What is the itch-scratch cycle?
Scratching gives brief relief, but it damages the skin barrier and releases more itch signals, which makes the skin itchier and leads to more scratching. Over time, skin can become thickened and even more sensitive. Breaking this cycle, by calming itch quickly and repairing the skin barrier, is the key to stopping long-lasting itch.
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How can you stop itchy skin at home?
- Moisturise twice a day, especially within a few minutes of bathing.
- Take short, lukewarm showers rather than long hot ones.
- Use fragrance-free, soap-free cleansers and laundry products.
- Cool the skin with a cold compress or a cooling cream when itch flares.
- Keep nails short and wear cotton gloves at night if you scratch in your sleep.
- Wear soft, breathable cotton and avoid wool next to the skin.
- Use a humidifier in dry or air-conditioned rooms.
Regular moisturising reduced eczema flares and itch across 77 trials (van Zuuren et al., 2017).
Can herbal and cooling creams help chronic itch?
Yes. A meta-analysis of 24 randomised trials found Chinese herbal medicine, alone or with conventional treatment, improved itch scores, quality of life and response rates in chronic pruritus, with no difference in side effects compared with conventional treatment (Wang et al., 2023).
- Menthol and borneol activate the skin's cold receptor TRPM8; a TRPM8-activating cream reduced itch in atopic dermatitis (Misery et al., 2019).
- She Chuang Zi contains osthole, which reduced scratching by blocking the TRPV3 itch channel (Sun et al., 2018).
Read more: the best herbs for itchy skin.
Where QICAOGANGMU fits
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When should you see a doctor about itchy skin?
- Itch lasting more than six weeks, or two weeks without improvement despite home care
- Itch all over the body without a visible rash
- Itch with weight loss, fever, night sweats, tiredness or yellowing skin
- Itch that keeps you awake or affects daily life
- Others in your household are also itchy (possible scabies)
Frequently asked questions
Why is my skin itchy all the time?
The most common causes are dry skin, eczema, contact dermatitis and fungal infection, often kept going by scratching. Long-lasting itch without a rash can also come from internal conditions and should be checked by a doctor.
How do I stop itching fast?
Cool the skin with a cold compress or a cooling cream containing menthol, avoid scratching, and moisturise. Cooling ingredients activate the skin's cold receptors and ease the urge to scratch within minutes.
What illnesses cause itchy skin without a rash?
Kidney disease, liver and bile-duct problems, thyroid disorders, iron deficiency, diabetes, some blood disorders and nerve conditions can all cause itch without a rash.
Why is itching worse at night?
Skin loses more water at night, body temperature rises and there are fewer distractions, so itch feels stronger. Night-time itch shared with others in the home can also be a sign of scabies.
Do Chinese herbs help chronic itch?
A meta-analysis of 24 randomised trials found Chinese herbal medicine improved itch scores and quality of life in chronic pruritus, with side effects similar to conventional treatment.
Related articles
References
- Yosipovitch G, Bernhard JD. Clinical practice. Chronic pruritus. N Engl J Med. 2013;368(17):1625-1634. PMID 23614588
- Wang J, Chen Y, Yang X, et al. Efficacy and safety of Chinese herbal medicine in the treatment of chronic pruritus: a systematic review and meta-analysis of randomized controlled trials. Front Pharmacol. 2023;13:1029949. PMID 36712693
- van Zuuren EJ, Fedorowicz Z, Christensen R, et al. Emollients and moisturisers for eczema. Cochrane Database Syst Rev. 2017;2:CD012119. PMID 28166390
- Misery L, Santerre A, Batardière A, et al. Real-life study of anti-itching effects of a cream containing menthoxypropanediol, a TRPM8 agonist, in atopic dermatitis patients. J Eur Acad Dermatol Venereol. 2019;33(2):e67-e69. PMID 30067875
- Sun XY, Sun LL, Qi H, et al. Antipruritic effect of natural coumarin osthole through selective inhibition of thermosensitive TRPV3 channel in the skin. Mol Pharmacol. 2018;94(4):1164-1173. PMID 30108138
Educational information only. Long-lasting itch, especially without a rash, or with other symptoms, should be assessed by a qualified healthcare professional.
