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.
An internal hemorrhoid can remain without symptoms for a long time. Bleeding and extension of internal hemorrhoids through the anus are the most common symptoms. This is known as prolapse. When the hemorrhoids develop a blood clot, known as thrombosis, the condition is more serious and needs evaluation.ain, itching, and bleeding are common symptoms. Hemorrhoids inside the rectal opening are usually painless, but often bleed and cause a feeling of fullness. This may result in an urge to have a bowel movement even when there is no stool present. Straining to have a bowel movement can aggravate the problem.