The baby gums are swollen and bleed when touched, considering that it is caused by apical periodontitis, gingivitis, vitamin C deficiency, and so on. 1. Periapical inflammation: may be due to dental caries or dental trauma bump, resulting in inflammation around the root of the tooth, causing redness, swelling and pain, and may bleed when slightly bumped. 2. Gingivitis: it may be due to the baby’s poor oral hygiene, resulting in a large amount of food debris and soft tartar on the gums, thus causing gingivitis, in eating or brushing teeth, there may be a touch of bleeding phenomenon. 3. Vitamin C deficiency: when the lack of vitamin C, will lead to increased permeability of the capillaries, sometimes there will be symptoms of swollen gums, a slight touch may cause bleeding. Swollen baby gums bleeding at the touch may also be caused by other reasons, it is recommended to take the baby to the hospital in time for examination.