Enlargement and darkening of one side of the labia minora is normal and usually not a disease. However, if there is localized swelling and pain, it may be an inflammatory disease.
Enlarged labia minora is a congenital developmental problem, normal human bilateral labia are generally not exactly the same size, which is normal. The darkening of the labia may be related to uneven pigmentation or heredity, and frequent wearing of tight clothing can also lead to poor local microcirculation.
However, if there is local swelling and pain, labia obvious color change or abnormal secretion, you need to go to the hospital in time to do the examination, which may be vaginitis, cervicitis and other diseases.
One side of the labia minora is enlarged, black but no other symptoms do not need to worry too much, if there is discomfort, then you need to consult a doctor in time, symptomatic treatment.