hello there...there are few age related problems with the gums...you have not specified your age....brushing 3 times wont help if your brushing technique is not right....when deposits over your teeth gets accumulated , the gums gets inflamed....As it gets inflamed they get swollen and starts bleeding even on mild stimulation.....you are suppose to get yourself examined by your dental surgeon and get your oral prophylaxis done....even after cleaning of your teeth you have the same problem,visit a periodontist the one who is specialized in gum surgeries....dont worry...your problem can be treated...

Bleeding gums can be caused by various conditions.Nutritional deficiency, especially deficiency of vitamin K can manifest in bleeding gums. It is the vitamin that is required for blood clotting. Deficiency of this vitamin can cause delay in blood clotting. Deficiency of vitamin C can also cause gum problems.
Ill fitting dentures, smoking and use of tobacco, improper flossing, infection of the teeth or the gums and use of certain medications like, anticoagulants, calcium channel blockers, nasal sprays, oral contraceptives and antidepressants are some other possible causes. Apart from these, frequent gum bleeding could be a sign of bleeding disorder, scurvy and leukemia. Chemotherapy drugs too can cause bleeding from gums.

Hello,
Thanks for writing in.
I read your problem,i would like to tell you that bleeding gum indicates gum inflammation,which could be because of so many factors like-
1.Ill fitting dentures.
2.Deposits on tooth surface,restoration and denture.
3.Vitamin k and c deficiency.
4.Medications like-calcium channel blockers,nasal sprays etc....

You said that you use to brush twice daily,it does not mean that there is no deposit on your tooth surface.
So i will suggest you visit a dentist in your area as soon as possible and get the thorough examination done and take a proper treatment and go for scaling if needed.
Nothing to get worried.
Take Care
Dr.Gunjan Gupta