Bleeding suggests that u are having some gum swelling. The gum swelling is usually because of deposits in teeth. You have to get a cleaning i.e scaling done once by dentist and later maintain by brushing. Till the time u visit dentist continue brushing and do warm salt ater rinse .
Next Steps
visit dentist and get professional cleaning done
Health Tips
don't be afraid that the bleeding happens on brushing.and just keep on brushing.if u don't brush properly then the problem will aggravate.