Obsessive Compulsive Disorder (OCD) is an anxiety disorder which is usually characterized by two types of symptoms, namely.obsessions and compulsions.

Psychosomatic disorders include psycho-cutaneous disease, obsessive-compulsive disorde r(OCD) might be expressed as dermatological lesion and are known as dermo-OCD.

The aim of this study were to determine the prevalence and severity of OCD and its relationship with dermatological disease in sari, Iran, 2011.

The sample consisted of 265 consecutively presenting dermatological patients who agreed to participate in the study, the subjects were assessed with structured clinical interview (SCID-I) by psychiatrist resident and also completed the yalebrown obsessive compulsive scale(Y-BOCS). T-test and chi-square were used to analyze of data.

Of the 265 dermatological patients, 24(9.1%) met DSM-IV criteria for OCD. Only 9(37.5%) of them had previousely been diagnosed as OCD. The most common obsession were washing 13(54.1) and pathological doubt 7 (25%), contamination7 (25%), checking 7(25%).

There is a high prevalence of OCD in dermatological patients and with considerating of importance of OCD with comorbitiy of skin disease, dermatologist must be aware about relationship between two disorders and referring OCD patients to psychiatrist.