1. Gum diseases caused bacteria due to improper cleaning/brushing
2. Brush in small circular motion at area between gum and teeth.
toothpaste, toothbrush, mouth guggles, dental floss
flossing is the most effective in getting out the food particles lodged in between the gum and teeth and in between teeth.

http://www.nlm.nih.gov/medlineplus/ency/...

I’m a Dentist,so if u don’t mind i’ll answer in scientific way
The answer of first question:
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Reasons of gum bleeding may be from A-**LOCAL** reasons such as:
1-Calculus accumulation which acts as sharp knives upon the gums and also make bacteria and food to accumulate upon it,and thus worsen its condition.(So u must visit ur dentist to remove it if it is present as it can’t be removed by tooth brush)..
*calculus means very thick layer of plaque accumulation.
2-Iregular use of tooth brush and dental floss,as the first make the gum more healthy by making a massage to it which promote the blood circulation and prevent its inflammation and of coarse remove the food debris,dental floss removes the food debri which present in between the teeth where the dental brush can’t reach.
3-Present of POCKETS between the teeth..even if you use the tooth brush regulary it will gum will bleed from this pockets so u need to visit the dentist to clean them.
B-** SYSTEMIC** reasons:
1-Low level of Vitamin C which can easily(if it is mild) conpunsated by eating or drinking oranges,lemons..etc ,but if it is severe u will need to ask ur dentist to prescribe vitamin c capsules.
2-Diabetes.but if u regularly use tooth brush and dental floss the gum will be healthy.
The answer of second question:
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correct technique to brush the teeth is to move the brush gently from the gum surface toward the teeth so it’ll be in the upper teeth from upward to downward and in the lower teeth from downward to upward,this the correct one but don’t forget the insider surface of the lower and upper teeth as this mainly the site of plaque accumulations.
“Note”At first gum will bleeds every time u use the brush in the first 3 days then bleeding will stop only in case if there is not any Calculus present.
**One should knows that plaque is a normal pheneomena in the mouth ,it occures after 12 hours from brushing .
The answer of third question:
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1-Dental brush(soft-medium-hard)
2-inter dental floss
3-interdental brush (used for cleaning dental pockets but after dentist advice)
4-Mouth wash (used for removing mild gums inflammations and give the mouth fresh breath)

1. plaque build up 2. gum disease 3. dirty teeth
brush top to bottom and every tooth. Brush the tongue and roof of mouth.
FLOSS, gargle with listerine.

answers r in my email accoount u can contact me

1) probably just brushing too hard- I get it all the time. Thats one for you!
2) Brushing technique- my dentist told me up and down not side to side at the front, and at the sides try as if you’re ‘scraping’ the teeth from the top of the gum away to the tip of the tooth
3)Just toothpaste, floss and mouthwash if you want spangly breath for the morning (who doesn’t?)

1)infection
vit c deficiency
wrong technic brushing
2)vertically and gently
3)fluoride
baking soda
salt

Thanks for the useful info. It’s so interesting