Itching inside the thigh muscle may be caused by allergy, pruritus, myocutaneous neuritis, etc. Patients should consult a doctor in time to clarify the cause of the disease and then carry out appropriate treatment. 1. Allergy: If the patient in the occurrence of itching inside the thigh muscle before the experience of contact with pollen, animal hair and other unspecified allergic substances, resulting in local erythema, itching and other discomfort. 2. Pruritus: if the itching on the inner thighs has no primary skin lesions and only manifests itself as a localized ant-crawling sensation and itching, it should be considered to be caused by pruritus. 3. Myocutaneous neuritis: itchy thigh muscle inside may be caused by myocutaneous neuritis, which will also have localized numbness, pins and needles sensation as well as skin flaking, you should consult a doctor in time, for treatment. Itchy thigh muscles, it is recommended to consult a doctor in time, the above drugs should be used under the guidance of a doctor.