For about 2 months, i have an itch the size of an open hand, starting about 3" from my belly button. there are no visible signs on the skin.

Itchy Skin: Are you having any other symptoms, like fatigue, weight loss, stomach aches, change in bowel habits, yellow skin, or fever? The causes can be many, and include neuritis/neuropathy, as well as dermatologic. Without a medical history, it is hard to say. If it doesn't go away, i would make an appointment with your doctor and have a thorough evaluation and a battery of lab tests to narrow it down.

See a doctor: You need to be examined to determine the cause of this. Good luck.

Rash near belly butt: There are many possible causes. If one has an allergy to nickel, they may get a rash below the belly button. If they wear jeans containing metal buttons. Persons with this type of allergy often develop rashes when wearing costume jewelry.