Delusional parasitosis is a mental health condition that makes someone feel like insects or parasites are crawling on their skin. It is also sometimes called Ekbom syndrome. People with delusional parasitosis feel like bugs are living on or inside their skin, but doctors can't find any insects or parasites there. It is a condition that affects how people think and can cause distress, fear and anxiety. It is important to talk to a doctor if you think you might have delusional parasitosis.