Itchy skin, also known as pruritus, is a common condition that can be caused by a variety of factors. Some of the most common causes of itchy skin include:

• Skin conditions: Examples include dry skin, eczema, psoriasis, scabies, parasites, burns, scars, insect bites, and hives.
• 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: Examples include multiple sclerosis, pinched nerves, and shingles (herpes zoster) .
• Psychiatric conditions: Examples include anxiety, obsessive-compulsive disorder, and depression.
• Irritation and allergic reactions: Wool, chemicals, soaps, and other things can irritate the skin and cause rashes and itching. Sometimes a substance, such as poison ivy or cosmetics, can cause an allergic reaction.

Depending on the cause of the itchiness, the skin may look no different than usual or it may be inflamed, rough, or have bumps. Repeated scratching can cause raised thick areas of skin that might bleed or become infected. To get relief, you must know which skin condition you have. The best way to get an accurate diagnosis is to see a board-certified dermatologist. Many people find relief with self-care measures such as moisturizers, gentle cleansers, and lukewarm baths. Long-term relief requires identifying and treating the cause of itchy skin.