Onions eaten raw will not grow mouth ulcers, you worry too much, onions are a very good food, can be eaten in moderation

Onions contain phytobactericides such as allicin, and thus have a strong bactericidal ability. Chewing raw onions can prevent colds.

Contains prostaglandin A can dilate blood vessels, reduce blood viscosity, and thus will produce lower blood pressure, increase blood flow in coronary arteries, and prevent thrombosis. Regular consumption of hypertension, hyperlipidemia and cardiovascular patients have health effects.

Not to be consumed in excess, where there is itchy skin disease and eye disease, eye congestion should be eaten sparingly, excessive consumption will produce flatulence and excessive exhaust.