Overview
Diagnosis
Diagnosing the cause of itchy skin begins with a physical examination and a review of medical history. If a healthcare professional suspects a medical condition is behind the itching, several tests may be recommended.
Common diagnostic tests include:
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Blood test: A complete blood count can detect conditions such as anemia that may cause itching.
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Liver and kidney function tests: Disorders involving the liver, kidneys or thyroid (such as hyperthyroidism) can trigger itchy skin.
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Chest X-ray: Helps identify enlarged lymph nodes, which may be associated with itchy skin.
Treatment
Treatment for itchy skin focuses on removing or managing the underlying cause. If home remedies are not effective, prescription medications or other therapies may be needed. Managing chronic itching can be challenging and may require long-term treatment.
Corticosteroid creams and ointments:
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Medicated creams or ointments may be applied to inflamed, itchy skin. Covering the area with damp cotton helps the skin absorb the medicine and provides a cooling effect.
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Severe or long-term itching bedtime routine: Bathe in lukewarm water for 20 minutes, apply triamcinolone 0.025% to 0.1% ointment to damp skin, then wear pajamas. Repeat for several nights for improved relief.
Other creams and ointments:
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Calcineurin inhibitors: Such as tacrolimus (Protopic) and pimecrolimus (Elidel).
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Topical anesthetics: Provide temporary relief.
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Capsaicin or doxepin cream: May help reduce itching sensations.
Oral medicines:
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Selective serotonin reuptake inhibitors (SSRIs): Such as fluoxetine (Prozac) and sertraline (Zoloft), may help with chronic itching.
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Tricyclic antidepressants: Such as doxepin, can also be effective. Some medications may take 8–12 weeks to provide full benefit.
Light therapy (phototherapy):
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Phototherapy exposes skin to controlled light wavelengths and is suitable for people who cannot take oral medications.
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Multiple sessions are typically required until itching improves.
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