When I suck my upper gums, there is bleeding and a bad taste. Why?

Hello,

Welcome to iclliniq.com.

It is the beginning of gum infection you are talking about, and you need to get scaling done soon. Bleeding gums is because of developing plaque at gum lines which initially cause gingivitis or inflamed gums, but if left untreated, plaque will turn harder, and there is also increased bleeding with time-lapse leading to periodontitis or problem in periodontal bone or teeth surrounding bone or jaw bone. Plaque, no matter soft or hard, cannot be removed by toothbrushing, so the mistake is not yours. You can continue with your routine brushing twice a day and get an appointment from a periodontist or any family dentist and get full mouth deep scaling done. It will not take much of your time but will surely save you from further complications in the future, both health-wise and cost-wise. I hope this was helpful.