Hi welcome to Health care magic forum.
Thanks for calling H.C.M.
Some girls will have labio minora exposed to out side from under the labio majora. it usually become appearent at the age of around 25years. It is quite a normal part, and nothing to worry about it . It covers clitoris
, external urithra, and vegina. If you are at this age group, and there is no pain or discomfert you need not worry.