Injection therapy, also known as sclerotherapy, is a non-surgical treatment option for hemorrhoids. The procedure involves injecting a sclerosant solution into the hemorrhoid tissue. The solution causes the blood vessels feeding the hemorrhoid to shrink and the hemorrhoid to reduce in size and eventually fall off. The procedure is typically performed in a doctor's office and does not require any anesthesia. Recovery time is relatively short, with patients typically returning to normal activities within a day or two. Injection therapy is considered to be a safe and effective treatment option for hemorrhoids and is typically used for early-stage hemorrhoids.