Olfactory reference syndrome (ORS) is a psychiatric condition in which there is a persistent false belief and preoccupation with the idea of emitting abnormal body odors which the patient thinks are foul and offensive to other individuals.
In the DSM-5 it is classified as a “Other Specified Obsessive-Compulsive and Related Disorder.” It is mentioned on p. 264 of the DSM-5 (where it is also referred to as Jikoshu-kyofu) and on p. 837 where it is listed under Taijin kyofusho.
Wikipedia provides a decent overview: https://en.wikipedia.org/wiki/Olfactory_reference_syndrome
References
Arenas, B; Garcia, G; Gómez, J; Renovell, M; García, V; Olucha-Bordonau, FE; Sanjuán, J (Jan 16, 2013). "[Olfactory reference syndrome: a systematic review]". Revista de Neurologia. 56 (2): 65–71. PMID 23307351.
Begum, M; McKenna, PJ (Mar 2011). "Olfactory reference syndrome: a systematic review of the world literature". Psychological Medicine. 41 (3): 453–61. doi:10.1017/S0033291710001091. PMID 20529415.
Greenberg JL, Berman NC, Braddick V, Schwartz R, Mothi SS, Wilhelm S. (2018). Treatment utilization and barriers to treatment among individuals with olfactory reference syndrome (ORS). J Psychosom Res, 105:31-36. https://www.ncbi.nlm.nih.gov/pubmed/29332631
Fuesener. (2014). Olfactory Reference Syndrome: Issues for DSM-V. [Link]
Lochner, C; Stein, DJ (Oct–Dec 2003). "Olfactory reference syndrome: diagnostic criteria and differential diagnosis". Journal of Postgraduate Medicine. 49 (4): 328–31. PMID 14699232.
Phillips KA, Gunderson C, Gruber U, Castle D (2006). "Delusions of body malodour: the olfactory reference syndrome." (PDF). In Brewer WJ, Castle D, Pantelis C (eds.). Olfaction and the brain. Cambridge: Cambridge University Press. pp. 334–353.
Phillips KA, Castle DJ (2007). "How to help patients with olfactory reference syndrome" (PDF). Current Psychiatry. 6 (3).
Thomas. (2017). Sniffing out olfactory reference syndrome. [link]
Olfactory Reference Disorder: Diagnosis, Epidemiology and Management. Thomas E, du Plessis S, Chiliza B, Lochner C, Stein D
CNS Drugs. 2015 Dec; 29(12):999-1007. [PubMed] [Ref list]
Wilhelm S, Phillips KA, Steketee G. (2013). Cognitive-Behavioral Therapy for Body Dysmorphic Disorder: A Treatment Manual. New York, NY: Guilford Press.
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Online information