Dermatozoenwahn An alternate term for organic hallucinosis and delusional parasitosis , the continuous belief parasites or insects have infested that one's skin or body. This state cannot be diagnosed if they produce the hallucinatory state while the individual is under the influence of drugs or alcohol, or if the individual fulfils the criterion for delirium . If an individual is under the influence of a drug or experiencing the symptoms of withdrawal from that drug, this condition is not psychiatric but medical and termed formication . Copyright Notice Adapted from Wikipedia. Text is available under the Creative Commons Attribution-ShareAlike License 3.0 ; additional terms may apply.