Bleeding is the most common symptom of internal hemroids.The reasons of the problem you suffer for are the following:
1. The first is that an internal hemroid is a protrusion into the anal canal, which is supposed to be rather smooth.
2. In addition, the mucus membrane is thinner and more delicate than skin to begin with. When it swells outwards, as with a hemroid, the overlying tissue gets even thinner.
3. Most internal hemroids are also inflamed to some degree, which means that there is more blood collecting in the hemroid than in other areas of the anal canal, which means that more blood comes out.
4. Last, an internal hemroid is a varicosity, or swelling, of a relatively large blood vessel. Therefore a hemroid brings its blood vessel much closer to the surface of the mucus membrane than normal, which vastly increases the chance of noticeable bleeding.
For more information and resources the following site will be a helping one:
http://www.hemorrhoidshemroids.com/internal-hemroids-hemorrhoids-symptoms.html
