Internal hemorrhoids are a common condition in proctology, clinically characterized primarily by intermittent, painless rectal bleeding. The blood is bright red, often appearing in a jetting or dripping pattern after defecation or on toilet paper during wiping. Simultaneously, the clinical symptoms of internal hemorrhoids vary with their stages. For instance, grade I internal hemorrhoids mainly exhibit intermittent rectal bleeding without any prolapse of anal materials. Grade II internal hemorrhoids show symptoms of intermittent rectal bleeding accompanied by prolapse of anal materials, which can spontaneously reduce. Grade III internal hemorrhoids are characterized by prolapsed anal materials that cannot reduce on their own and require manual intervention. This stage also involves rectal bleeding. Grade IV internal hemorrhoids are the most severe, presenting with irreducible prolapsed materials that can become trapped or may protrude during coughing or walking. Rectal bleeding is also a symptom. Surgical treatment is essential for grade IV internal hemorrhoids.