Correct method of lemon whitening

I think lemon is a kind of fruit rich in vitamin C, which has the effect of whitening skin. Apply lemon juice to your face and wash your face with lemon juice, lemon mask and lemon bath. The acidic substances in lemon may irritate the skin, so it is best to have a skin test before use. However, it is necessary to pay attention to the usage and precautions to avoid unnecessary harm to the skin.