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The most common cause of bleeding from gums is inflammation of the gums, otherwise called as gingivitis which leads to periodontitis if left untreated.
The reason to develop gingivitis is mostly associated with oral hygiene and oral hygiene habits. You may consult your local dental doctor and get a dental cleaning done and follow up after a week to check if your symptoms have subsided.
It is most likely to resolve if associated with oral hygiene. Other factors affecting gum health may be menopause, diabetes, etc. Visiting a dentist every six months for a regular check-up is recommended.
For more information consult a dentist online --> https://www.icliniq.com/ask-a-doctor-online/dentist