Gums bleeding is due to infection in gums. Get scalling done by dentist. Use proper brushing techniques. Brush , floss n use mouthwash twice daily. Massage ur gums with ur finger tips after brushing. Keep ur tongue clean. Rinse ur mouth well after each meal. Visit ur dentist for dental checkups every 6 months to detect n prevent dental probs.
Naturally our teeth colour ranges from pearly white to pale yellow so everyone cannot hv white teeth. Get scalling n polishing done by dentist. If u r not happy with ur teeth shade later, u can get bleaching done by dentist which 'll lighten ur teeth by 2-3 shades. Alternatively u can use a teeth whitening toothpaste such as snowdent. Avoid heavily coloured foods, tea n coffee, cool drinks, tobacco products as they stain teeth.
Bleeding gums may be due to mouth breathing and yellow teeth maybe due to staining of teeth due to mouth breathing Black color of gums is basically genetic The color of gums may improve if you brush your teeth vertically For bleeding gums stop mouth breathing and get scaling of teeth done