Difference between internal and external hemorrhoids 

Hemorrhoids are enlarged veins in the anal area that can be either internal or external. These two kinds are contrasted here:

Internal hemorrhoids develop above the dentate line, which marks the start of the anal canal, inside the rectum. Unless they prolapse, they are not felt or seen during a physical examination

Symptoms: Unless they prolapse, they usually don't hurt. Bleeding during bowel movements, discomfort if prolapsed, and a sense of incomplete evacuation are possible symptoms.

Treatment: For severe cases, treatment options include hemorrhoidectomy or rubber band ligation, as well as lifestyle modifications and drugs to minimize swelling.

External Hemorrhoids
Location: External hemorrhoids develop beneath the dentate line, beneath the skin surrounding the anus.

The symptoms may be unpleasant, particularly if the hemorrhoid is thrombosed (a blood clot forming inside the hemorrhoid). Swelling, itching, and pain when sitting or having bowel motions are among the symptoms.

Treatment: Cold compresses, sitz baths, and over-the-counter painkillers are used to ease discomfort. In extreme situations, surgical excision can be required.

Lifestyle modifications like eating a high-fiber diet, drinking enough of water, and avoiding extended sitting can help treat both forms of hemorrhoids. However, it is advised to see a doctor if symptoms intensify or continue.

	Internal Hemorrhoids	External Hemorrhoids
Origin	Above the dentate line in the anal canal.	Origin: Below the dentate line in the anal canal.
Lining epithelium	it is covered by simple columnar epithelium	Lining epithelium : it is covered by stratified squamous epithelium
Nerve Supply	it is supply by  Autonomic nerves, so it is typically painless.	Nerve Supply: it is painful because it is supplied by  Somatic nerves, particularly the pudendal nerve.
Blood Supply	Superior rectal artery from the portal venous system.	Blood Supply: Inferior rectal artery from the systemic venous system.
Causes	Increased portal venous pressure from factors like constipation or straining during bowel movement	Causes: Increased intra-abdominal pressure or pregnancy-related factors leading to enlargement and inflammation