Other psychiatric problems that often coexist with tics and tic disorders include learning disorders, impulse control disorders, school phobia, sensory hypersensitivity, and rage attacks.
Henoch-Schönlein purpura-A syndrome sometimes classified as a hypersensitivity vasculitis, associated with a variety of digestive symptoms, pain in the joints, and kidney involvement.
The doctor will begin by ruling out such other possible diagnoses as bacterial or viral infections, collagen vascular disease, hypersensitivity reactions, and malignant tumors.
Direct trauma and/or delayed type hypersensitivity reaction to nickel may occur from nasal rings and jewelry, facial adornments which as of 2004 are increasingly popular.
Netterlid, E, et al. "Persistent itching nodules after the fourth dose of diphtheria-tetanus toxoid vaccines without evidence of delayed hypersensitivity to aluminium."
Encephalitis is an inflammation of the brain, usually caused by a direct viral infection or a hypersensitivity reaction to a virus or foreign protein.
Pulmonary hypersensitivity allergic reactions that affect the lungs and result in rashes and fever may be caused by nitrofurantoin and sulfasalazine.
Vaccines may cause temporary suppression of delayed-type hypersensitivity skin reactions or alter certain lymphocyte function tests.
Immune hypersensitivity reaction-An allergic reaction that is mediated by mast cells and occurs within minutes of allergen contact.
A large number of prescription and over-the-counter drugs are available for treatment of immediate hypersensitivity reactions.