Itchy skin is a common problem that can be caused by a variety of factors. Here are some possible causes of itchy skin:

• Skin conditions: Examples include dry skin, eczema, psoriasis, scabies, parasites, burns, scars, insect bites, and hives.

• Allergic reactions: These can be caused by food, insect bites, pollen, and medicines.

• Irritation and allergic reactions: Wool, chemicals, soaps, and other substances can irritate the skin and cause rashes and itching. Sometimes a substance, such as poison ivy or cosmetics, can cause an allergic reaction.

• Internal diseases: Itching on the whole body might be a symptom of an underlying illness, such as liver disease, kidney disease, anemia, diabetes, thyroid problems, and certain cancers.

• Nerve disorders: When a nerve isn’t working properly, it can cause itchy skin. If there’s damage along a nerve due to disease or injury, you can also develop itchy skin. Diseases that can cause this type of itch include shingles, stroke, and multiple sclerosis.

• Medications or cancer treatment: Itch can be a side effect of taking some medications, such as aspirin, prescription-strength pain relievers called opioids, and some blood-pressure drugs. It can also be a side effect of cancer treatment.

• Psychiatric conditions: Examples include anxiety, obsessive-compulsive disorder, and depression.

To get relief from itchy skin, you could try applying cold compresses, using moisturizing lotions, taking lukewarm or oatmeal baths, using over-the-counter hydrocortisone cream or antihistamines, avoiding scratching, wearing irritating fabrics, and exposure to high heat and humidity. If your itching is severe, does not go away after a few weeks, or does not have an apparent cause, contact your healthcare provider. You may need other treatments, such as medicines or light therapy.