Feeling like there are bugs crawling all over your body may be caused by pruritus, peripheral neuritis, parasitic delusions and so on. 1. Pruritus: It is a kind of skin disease that only has skin itching without primary skin lesions. Its main manifestation is itching, there can be burning, ants and so on, often paroxysmal and night aggravation, can be limited or generalized itching. It may be limited or generalized itching. It may cause the body to feel like there are bugs crawling all over the body. 2. Peripheral neuritis: It is a general term for multiple peripheral nerve damage caused by various reasons. Mainly manifested as burning, numbness, pain and other sensory abnormalities in the limbs or sensory hypersensitivity and other irritation symptoms, such as ants crawling or pins and needles, etc., light numbness of the fingertips, or in severe cases can be extended to the entire limbs, or even the whole body. It can also lead to a feeling of insects crawling all over the body. 3. Parasite delusion: the patient is wrongly convinced that his skin is infected with parasites, but in fact there is no parasite infection. Its main manifestations are itching, ant-crawling sensation, scratches, scabs, vesicles, etc., and patients describe vivid images, very realistic, often accompanied by anxiety and other symptoms. It can also lead to a feeling of insects crawling all over the body. There are many other causes that can lead to a feeling of crawling bugs all over the body, which should be taken seriously, and it is recommended to consult a doctor in a timely manner to identify the cause of the disease and follow the doctor’s instructions for further treatment or therapy.