My gum gets swollen with fluid from time to time where my wisdom tooth is in the bottom left side what is the problem?

A dental problem: You need a dental exam to make a diagnosis, you may have gingiviits and periodontal disease. When did you last see your dentist?

Infection: You have a gum infection that is recurring, that is the gum over your wisdom tooth traps debris and becomes irritated and infected. Most likely, you will need the wisdom tooth extracted.

Infection or Cyst: Partially erupted wisdom teeth where the teeth are partially visible and covered with tissue are prone to localized infections or pericoronitis because of the difficulty in cleaning. Another possibility could be the presence of a localized cyst associated with the crown of the wisdom tooth. A clinical and radiographic exam would be strongly recommended to determine what treatment is indicated.