Im 19 a 0,5 cm flat dark brown oval mole-like spot suddenly appear on my outer labia is it normal?

See below: If you are sexually active, it may be a wart. It would be prudent to see your doctor as it is not feasible to know what the lesion is without examining it. For good health - Have a diet rich in fresh vegetables, fruits, whole grains, low fat milk and milk products, nuts, beans, legumes, lentils and small amounts of lean meats. Avoid saturated fats. Exercise at least 150 minutes/week and increase the intensity of exercise gradually. Do not use tobacco, alcohol, weed or street drugs in any form. Practice safe sex. Get HPV vaccine.