Hello dear See this bleeding is due to pericoronitis which is consistent inflammation around 3rd molars. It will be eradicated only by either extraction or operculectomy For further details you can consult me Thanks

Get xray of the area. If there's impacted wisdom tooth, get it removed. Consult through this for further details.

Hello, According to the picture you have show there is the swelling of gum in the wisdom tooth area where the tooth is not erupted or about to erupt and there is food lodgement in that area which is creating a swelling and bleeding from the gum. Xray should be taken and see the position of wisdom tooth and further proceed for the treatment.

Sometimes a gap created  between the teeth and gums which is called pocket. Due to this food lodgement is there that's why you have a bleeding. You must do warm saline gargles as many as in a day.