I feel a pea size lump on my stomach but ive no symptoms at all. What could it be its been there for over a year and feels hard. Its also under skin?

R/O LIPOMA. If the lump is on the stomach that is movable it is less worisome and may be a lipoma. You need a Ultrasound is needed to evaluate for /CYST/LIPOMA/less likely clot Please seek prompt evaluation for this issue if symptoms persist or worsen. .