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Hypersensitivity (also called hypersensitivity reaction or intolerance) is an abnormal physiological condition in which there is an undesirable and adverse immune response to an antigen. [ 1 ] [ 2 ] It is an abnormality in the immune system that causes immune diseases including allergies and autoimmunity .
The popular terms hypersensitivity (not to be confused with the medical term hypersensitivity) or highly sensitive are popular synonyms for the scientific concept of SPS. [2] By way of definition, Aron and Aron (1997) wrote that sensory processing here refers not to the sense organs themselves, but to what occurs as sensory information is ...
Electromagnetic hypersensitivity (EHS) is a claimed sensitivity to electromagnetic fields, to which adverse symptoms are attributed. EHS has no scientific basis and is not a recognized medical diagnosis , although it is generally accepted that the experience of EHS symptoms is of psychosomatic origin.
The symptoms of DRESS syndrome usually begin 2 to 6 weeks but uncommonly up to 8–16 weeks after exposure to an offending drug. Symptoms generally include fever, an often itchy rash which may be morbilliform or consist mainly of macules or plaques, facial edema (i.e. swelling, which is a hallmark of the disease), enlarged and sometimes painful lymph nodes, and other symptoms due to ...
Type IV hypersensitivity, in the Gell and Coombs classification of allergic reactions, often called delayed-type hypersensitivity, is a type of hypersensitivity reaction that can take a day or more to develop. [1] Unlike the other types, it is not humoral (not antibody-mediated) but rather is a type of cell-mediated response.
The hypersensitivity of people with PTSD to sensory stimuli is supported by an augmented P300 event-related potential response compared to healthy controls which indicates a semi-permanent heightened attention to deviant and salient stimuli. [9] Obsessive–compulsive disorder (OCD) [11]
Serum sickness is a type III hypersensitivity reaction, caused by immune complexes. [2] When an antiserum is given, the human immune system can mistake the proteins present for harmful antigens . The body produces antibodies, which combine with these proteins to form immune complexes. [ 2 ]
Hyposensitivity, also known as Sensory under-responsitivity, refers to abnormally decreased sensitivity to sensory input.. Hyposensitivity is especially common for autistic people and is more often seen in children than adults and adolescents due to masking.