brown tree snakes are nocturnal. most of Guam's native forest birds are not. explain how this has affected both the snakes and the birds. The snakes easily find and kill the sleeping birds, and the snakes success has allowed them to reproduce quickly.
A person may have both internal and external hemorrhoids. Symptoms of hemorrhoids include occasional throbbing pain, itching, burning sensation, bright red blood on toilet paper or stool, or a lump of soft tissue protruding outside of the anus.
Causes of hemorrhoidal symptoms. Hemorrhoids are normal tissue occurring in all people. Hemorrhoids can become large, can bleed, and can become tender. There is no single cause for hemorrhoidal symptoms but some factors may play a part: chronic constipation with straining.