A tingling sensation in the skin but no symptoms may be caused by herpes zoster, lateral femoral dermatitis and other causes. 1. Herpes zoster: Herpes zoster is an infectious disease caused by varicella zoster virus infection, which affects the nerves and the skin. Generally, patients will experience pain at the early stage of the disease, but there are no other symptoms on the skin, and blisters or papules will appear on the skin only in about 2~5 days. 2. Lateral femoral dermal neuritis: Lateral femoral dermal neuritis is caused by injury to the lateral femoral dermal nerve, which is mainly manifested as symptoms of numbness, tingling and burning sensation in the lower 2/3 of the skin area of the anterior lateral thigh, but there are no other manifestations on the skin. Skin tingling sensation but no symptoms, there may also be other causes, it is recommended to go to the hospital in a timely manner to improve the examination, to clarify the cause of the disease and then give targeted treatment.