<human>: Feel like Im being bitten all the time by invisible bugs.  No bite marks, rashes or itching.  Dermatologist told me I had Parasitic Delusion.  I have no evidence of a parasite, but I know what I feel is real.  My friend is experiencing the same thing,  Symptoms are a little different tho.  Am scared to death I have parasites on me and in my home.  I dont want to spread it around.  Not sure I absolutely the derma. since the bites are so very real to me.  What is your opinion.
<bot>: Hello. Welcome to Chat Doctor ... first I would like to know more details of your symptoms: your age, sex, since how long you are feeling like this, any diurnal variation, have you got skin lesions on itching site due to excessive itching, apart from itching are you feeling any somatic pains - bugs underlying skin localize to any specific body part etc... After getting your answers, I would decide regarding your illness. If I found delusional parasites, then I would like to start provide 2 mg tablet in night dose. I would like to increase dosage according to response. Pimozide 4 mg to 6 mg gives excellent response in such conditions. Best regards & thanks...