Rectum 

The symptoms most often associated with hemroids include itching, burning, pain, inflammation, irritation, swelling, and bleeding. Itching is rarely due to hemroids except when there is mucous discharge from prolapsing internal hemroids.

The common cause of anal itching include tissue trauma secondary to excessive use of harsh toilet paper, Candida albicans, parasitic infection and allergies.

Pain does not occur unless there is acute inflammation of external hemroids. As there are no sensory nerves ending above the anorectal line, uncomplicated internal hemroids rarely cause pain.

Bleeding is almost always associated with internal hemroids and may occur before, during or after excretion. When bleeding occurs from an external hemroids, it is due to rupture of an acute thrombotic hemroids. Bleeding hemroids can produce severe anemia due to chronic blood loss. 

Take a look at nature and you will see that all animals squat to defecate. Even our closest ancestors, the primates, squat down with their knees drawn up to their chests when 'nature calls'.

What you may not realize, however, is that even today most human beings still defecate in this natural manner, especially in Asia, Africa and the Middle East.

It is only in the industrial West, where the modern toilet was invented that people 'sit down' to defecate...

It is only in the industrial West, where the modern toilet was invented that people 'sit down' to defecate just as they sit down to eat...and instead of immediately doing what they are supposed to do - to evacuate - people instead engage in reading, writing, and other worldly activities. No wonder the entire Western world suffers from chronic constipation, bleeding piles, hemroids, and other problems caused by trying to evacuate the bowels in a sitting position on the sit-down toilet, invented by the way by a gentleman named Mr. Crapper. In fact in the years immediately following his invention the toilet as we presently know it was called way back then, 'the crapper'.

While the sit-down toilet may well save your legs the effort required to squat down properly, it is a device of terrible torture for your bowels, and the problems it causes are hardly worth the effort saved.