Bleeding gums is  d sign of infection and is called as gingivitis  and  if not treated in time it leads to Periodontitis.  So advice u to go for scaling and maintain oral hygiene.

Bleeding in gums occur when there is underlying infection.. get a thorough cleaning n polishing done by your dentist.. then d brownish discolouration could b judged correctly..

Mouthwash :thermokind/senquel AD/ rexidin Once in every 2 days, after meal, 5-10 drops maximum in your mouth, hold for next 2-3 minutes, mouth will salivate automatically once mouthwash is held in mouth (so no need of external dilution with water) spit out and do not eat drink anything or rinse mouth for next 15-20 minutes. And brush off teeth thoroughly after 20 minutes.