Urine protein 0.3(+1) mainly suggests mild proteinuria, but kidney stones generally do not cause proteinuria, proteinuria may be some physiological phenomenon, but it can not be ruled out as pathologically caused. Urine protein 0.3(+1) indicates that there is urinary protein in the urine, but the amount of proteinuria is not particularly large, it may be that strenuous exercise (or exertion), cold, fever, nervousness, sympathetic excitation and so on can cause temporary proteinuria. However, it may also appear in certain pathological states, such as acute nephritis, pyelonephritis, interstitial nephritis, systemic lupus erythematosus, anaphylactic purpura, diabetes mellitus, hypertension and other pathological states, which need to be actively taken to treat. To summarize, patients are advised to follow the doctor’s instructions for further examination, actively treat kidney stones, and actively search for the causes of proteinuria, so as to make clinical diagnosis and treatment, and strive for early recovery.