Ringworm does not usually cause membranous nephropathy. Ringworm refers to the pathogenic fungi invade the inner groin (including around the anus and perineum), resulting in annular or semi-annular lesions, is a kind of tinea corporis; manifested as a small piece of erythema with dandruff; gradually develop into pimples, blisters, scabs, accompanied by dandruff and hyperpigmentation, etc.; long time the disease skin can be infiltrated and thickened with mossy, mostly accompanied by itching. Membranous nephropathy is divided into idiopathic membranous nephropathy and secondary membranous nephropathy; the cause of idiopathic membranous nephropathy is not clear, secondary membranous nephropathy is mostly related to systemic lupus erythematosus, rheumatoid arthritis, hepatitis B virus infection, as well as medicines, toxins, tumors, or environmental factors; there is no ringworm in the causes of membranous nephropathy. In summary, ringworm does not cause membranous nephropathy. If there is any physical abnormality, it is recommended to actively consult a doctor to avoid delaying the condition.