Reactions to drugs or medications can also result in widespread itching that may be accompanied by a rash or hives.Poison ivy is another example of contact dermatitis.Irritation of the skin from contact with fabrics, cosmetics, or other substances can lead to itching that may be accompanied by a rash, known as contact dermatitis. Itching can also result from other conditions that affect the nerves or nervous systems, such as diabetes, shingles ( herpes zoster), or multiple sclerosis. This is often caused by a pinched nerve in the neck. It usually develops on the forearm over the head of the brachioradialis muscle, but it can occur anywhere in the upper extremities. Scabies is a highly contagious skin condition caused by an infestation by the itch mite Sarcoptes scabiei which is known to cause an intense itch that is particularly severe at night.īrachioradial pruritus is a neurologic condition that results in intense itching of the arms. The itch may also result from skin infestation by body lice, including head lice and pubic lice. Swimmer's itch, also called cercarial dermatitis, is a skin rash caused by an allergic reaction to infection with certain parasites of birds and mammals that are released from infected snails in fresh and saltwater. Other common infectious causes of itch include a yeast (fungal) infection of the crotch ( tinea cruris) commonly known as jock itch, psoriasis, and ringworm of the body ( tinea corporis).Īnother type of parasitic infection resulting in an itchy sensation is the so-called swimmer's itch. Vaginal yeast infections are another cause of vaginal itching. Vaginal itching is sometimes referred to as feminine itching, and sexually transmitted diseases can also cause anal itching and pain. Genital itching or anal itching, which may accompany burning and pain, in men and women can occur as a result of genital infections such as sexually transmitted diseases ( STDs). Infections and infestations of the skin are another cause of the itch. This is considered to be a type of allergy (an immune system reaction against a foreign substance) that is associated with inhaled allergies ( hay fever) and is chronic. Itching, rash, and thickening of the skin over time are characteristic symptoms of atopic dermatitis. Patients with psoriasis typically develop red, elevated, scaling plaques of dry, itchy skin.Ītopic dermatitis is a chronic inflammatory disease of the skin that usually starts in childhood. Psoriasis is a chronic cause of skin inflammation that can also be associated with itching. Itching can also result from insect stings and bites such as mosquito or flea bites. Itching is common with allergic reactions, such as food allergies or other types of allergies. diseases of the blood (for example, polycythemia rubra vera).interruptions in bile flow ( cholestasis) from liver disease, and.cancers (for example, lymphoma), reactions to drugs,.metabolic and hormone disorders (for example, kidney disease, hyperthyroidism),.Other causes of generalized itching that may not produce a rash or specific skin changes include Many people also report sunburn itch following prolonged exposure to UV radiation from the sun along with the pain of sunburn.Dry skin ( xerosis) is perhaps the most frequent cause of itch without a rash.Stress also can aggravate itch from other causes.Stress, anxiety, or other emotional problems can cause itching. Itching can be caused by many conditions.
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