The symptoms of external hemorrhoids are numerous and can cause considerable discomfort. Internal hemorrhoids however do not produce the same symptoms and are usually only marginally uncomfortable.
Internal hemorrhoids are difficult to detect even though they can be quite harmful to the human body. External hemorrhoids, though generally quite uncomfortable are usually less harmful than internal hemorroids.
Bleeding - With either internal or external hemorrhoids, if you experience bleeding from the anus, particularly during bowel movements you should consider the possiblity that you may have hemorrhoids. Though bleeding is not a symptom that will conclusively prove that one has hemorrhoids it is an indication that they may have hemorroids, either internal or external or both.
Internal Bloating - Sometimes internal hemorrhoids, though not particularly uncomfortable, may cause a sensation of being bloated or filled, even immediately after defication. This is because the swollen veinous tissue within hemorrhoids fills up the rectal area.
Itching & Pain - External hemorrhoids are notorious for causing extensive itching, directly on the anus. External hemorrhoids, swollen and gorged with blood, can also cause considerable pain, especially when pressure is present. Sitting, especially on hard surfaces can further irritate external hemorrhoids.
Swelling & Inflamation - External hemorrhoids are usually swollen and inflamed. They look like red or purple bulbs directly on the anus. Prolapsed internal hemorrhoids do not cause pain and irritation but they can be seen and appear as dark purple bulbs. They are prone to bleeding.
Clotting - Thrombosed hemorrhoids are external hemorrhoids that have clotted, often dried, blood within them. They appear as large purple bulbs on the anus and are sometimes hard to the touch. When thrombosed hemorrhoids bleed a lot they are known as bleeding hemorrhoids.