Case vignette 3 reports a tactile sensation of having dirty hands, which prompts excessive hand washing (Table 1). Similarly, content analyses have revealed a key theme in the content of contamination obsessions to be sensations of feeling dirty under the skin, which lead to washing rituals [78]. SP are also prevalent in Tourette syndrome (TS) [22, 73], in which they manifest as premonitory urges or “sensory tics” [79] in a specific body part prior to a tic.
