No single cause has been found for misophonia. Experts consider that it is caused by the way the brain and central nervous system process information rather than a physical change. Increased activity in the hearing pathways and enhanced anxiety as well as other reactions to sounds have been blamed. It is also associated with hearing disorders. People with tinnitus, deafness and hearing loss are more likely to have misophonia.

There are behavioural theories also which explain that conditioning could play a role. People learn to react to normal noises in an extreme way and this becomes habit. The illness could come about as the individual reacts to a normal normal noise in a negative way.

Misophonia tends to occur with other disorders like OCD, Tourette's and eating disorders. Girls are at higher risk before puberty.

Common triggers include wheezing, snoring, whistles, chewing, sniffing and talking with the mouth full. Other causes include teeth grinding, slurping drinks and coughing. Reactions can include rage, fear and annoyance. The sufferer may try to leave the area. It is usual that the respondent starts with annoyance which rapidly becomes more severe. It may end up being out of proportion with the initial problem.

This article is not intended to be taken as medical advice. If you believe any of the issues mentioned may affect you then seek medical advice.