Hemorrhoids can be dangerous if they begin to bleed and become infected. This can lead to a septicemia (infection in and of the blood).
You can have either external or internal hemorrhoids. Preparation H or Anusol both work just fine, and a combination of the cream for external hemorrhoids and suppositories for internal hemorrhoids is best to be safe.
Hemorrhoids can come from straining to have a bowel movement, or from standing for long periods without much walking.
Preventitive treatment includes being sure you have adequate fiber in your diet, or taking a bulk laxative such as Metamucil, or a saline laxative such as milk of magnesia.
Treat your hemorrhoids for about a week, or at least three to four days after the symptoms go away.
Hemorrhoids Cure & Piles Treatment