Legs like ants crawling difficult may be due to skin allergies, diabetes, lumbar disc herniation, lateral femoral dermatitis and other factors. 1. Skin allergy: If eating or skin contact with allergens can lead to allergic reactions, the whole body or local skin may appear red rash, swelling, itching like ants crawling related allergy symptoms. 2. Diabetes mellitus: patients with diabetes mellitus, the peripheral nervous system may be subject to certain damage, resulting in abnormal sensation of the peripheral nervous system, may appear like ants crawling on the legs of the symptoms. 3. Herniated lumbar intervertebral disc: the lumbar nervous system of patients with herniated lumbar intervertebral disc is compressed by the protruding vertebrae, which may lead to blocked nerve conduction, abnormal sensation, and the feeling of ants crawling on the legs may also occur. 4. Lateral femoral dermal neuritis: patients with lateral femoral dermal neuritis due to inflammation of the nerve stimulation, may lead to abnormal nerve function, ant-crawling sensation, burning sensation, tenderness and other sensory disorders. Legs like ants crawling hard can also be seen in other reasons, the patient should go to the hospital in time, in the diagnosis of professional doctors and under the guidance of standardized treatment.