Rectal bleeding is the primary clinical symptom of internal hemorrhoids, typically characterized by bright red blood. Bleeding after bowel movements is one of the early symptoms of internal hemorrhoids, which often have no significant initial conscious symptoms, commonly presenting as blood-streaked stool after defecation. Bleeding after bowel movements can appear as dripping or spraying, bright red, painless, and not mixed with the stool. This distinction is crucial for differentiating from cancer. Rectal bleeding generally increases in severity over time, progressing from small amounts of blood to significant bleeding. Prolonged and repeated bleeding can lead to severe anemia in patients.