Psychogenic (Twycross et al, 2003). Delusional parasitosis Itchy skin is a common problem that can be hard to diagnose. An example of this is delusional parasitosis, where the patient becomes delusional and irrationally believes that they are infested with parasites (of course, there are no real parasites – only ones in their mind! Itching is a normal body response to protect us from harmful external substances or parasites such as insect bites. The C-fibres are similar but distinct … Paresthesia. Itch is an unpleasant sensation on the skin that provokes the desire to rub or scratch the area to obtain relief. Notalgia paraesthetica – itch localised to between or below the scapulae. Itch is a common symptom in the general population, and its prevalence increases with age. Another type of itch is a psychogenic itch, where the sensation of itching comes as a result of a psychiatric disorder. However, there are some things you can try – and treatments your GP or pharmacist can offer – that may help relieve an itch and reduce the risk of skin damage caused by scratching. However, pruritus (or itch) is a common and distressing symptom of many skin diseases, systemic illnesses and psychological disorders. Sometimes it is just imagined while at other times it is linked to mental health disorders such as depression and dementia. Furthermore psychogenic itching may be more noticeable at night for reasons discussed above. Pruritus is the medical term for itch. Neurological itch: Brachioradial pruritus – itch localised to dorsi-lateral forearm (sometimes shoulder). Pruritus (itching) refers to a sensation of the skin which causes a desire to scratch. Pruritoceptive itch originates from the skin due to the stimulation of free nerve endings of specialised C-fibres, which lie close to the junction between the epidermis and dermis. Video. jock itch (sometimes called dhobie itch, an infection in the groin area) pityriasis versicolor (this causes small patches of scaly and discoloured skin, often on your back, chest, upper arms, neck and tummy) Terbinafine comes as a cream, gel or spray for treating athlete's foot, ringworm, jock itch … Psychogenic itching is the term for psychological causes of an itchy skin. ). Psychogenic (including functional itch disorder and rarely delusional infestation). Read more about some of the causes of itching.. The treatment for itching will largely depend on the cause. If you’ve ever felt as though your skin was crawling, or had numbness or itching for no apparent reason, you may have experienced paresthesia. WebMD looks at the possible causes, from minor irritants to serious illnesses. Psychogenic itch: Anxiety and depression can be associated with itch and can be made worse by it. Stress may also affect itch, along with the itch-reward cycle. People with a history of insomnia may also complain of itching at night although it is difficult to isolate it to an underlying physiological mechanism. Itching and conditions that cause persistent itching can be a source of anxiety. Agents which may be involved include histamines, leukotrienes, opioids, serotonin, cytokines (eg, interleukin-31), neuropeptides, itch-specific neurons and interneurons. Immune cells and glial cells may be involved to a greater extent than was previously thought. This video on causes of nighttime itching was produced by the Health Hype team. Itch can cause discomfort and frustration; in severe cases it can lead to disturbed sleep, anxiety and depression.
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