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.
Internal hemorrhoids. The most common symptom of internal hemorrhoids is rectal bleeding. You may find bright red streaks of blood on the toilet paper or bright red blood in the toilet bowl after having a normal bowel movement. Blood also may be visible on the surface of the stool. Other symptoms of internal hemorrhoids may include: Itching. This is a frequent complaint, because internal hemorrhoids often seep mucus, which can irritate the anal skin and cause itching.