How many internal hemorrhoids can a person have? how many can be banded?

Usually 3: and depends in some all the three , on need and patient's threshold to tolerate the discomfort due to the procedure

Hemorrhoids: Generally there are 3 internal hemorrhoids, right anterior, right posterior, and left lateral. They can all be banded, but generally only 1 is done at a time so as to minimize the rare but possible complications of pain or bleeding. Although there are 3 hemorrhoids, it may take more than 3 sessions to get them all adequately treated.