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The head may be affected, but this is typically only in young children. [2] The itch is often worse at night. [2] Scratching may cause skin breakdown and an additional bacterial infection in the skin. [2] Scabies is caused by infection with the female mite Sarcoptes scabiei var. hominis, an ectoparasite. [3]
Itchy skin; Rash; Facial swelling; Wheezing; Anaphylaxis; Symptoms of a potential insect bite/sting allergy include: [5] A large area of swelling (edema) at the bite/sting site; Itching or hives all over the body; Cough, chest tightness, wheezing or shortness of breath; Anaphylaxis; Symptoms of allergic skin conditions such as atopic dermatitis ...
Also, the area of the skin on which the symptoms appear tends to be different with every type of dermatitis, whether on the neck, wrist, forearm, thigh or ankle. Although the location may vary, the primary symptom of this condition is itchy skin. More rarely, it may appear on the genital area, such as the vulva or scrotum.
The most common type, atopic dermatitis, causes chronic itchy and dry and cracked skin, and it is strongly associated with allergies such as asthma or hay fever.
[2] [5] Atopic dermatitis results in itchy, red, swollen, and cracked skin. [2] Clear fluid may come from the affected areas, which can thicken over time. [2] Atopic dermatitis affects about 20% of people at some point in their lives. [2] [4] It is more common in younger children. [3] Females are affected slightly more often than males. [6]
Miliaria, commonly known as heat rash, sweat rash, or prickly heat, [1] is a skin disease marked by small, itchy rashes due to sweat trapped under the skin by clogged sweat-gland ducts. Miliaria is a common ailment in hot and humid conditions, such as in the tropics and during the summer. [ 2 ]
Generalized itch, or itching across the whole body, can be a symptom of a dermatological disorder or an underlying systemic problem. [13] Some systemic diseases can that cause generalized itch include diabetes, hypothyroidism, kidney diseases and liver diseases. [14] [13] It is usually treated with systemic agents instead of topical agents. [15]
Psychogenic pruritus typically appears as itching on the face and on the extensor surfaces of the body. This includes the back side of the arms, the abdomen, the side of the legs and the upper back and shoulders. These areas are more frequent because they are within hand's reach. [1]