I am getting nosebleeds in my left nostril only?

Not unusual: Most people occasionally get nose bleeds and it is usually on the same side. If it is bothersome, see an ENT doctor and s/he may cauterize the area, Little's area, to curtail bleeding. 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.