Can you tell me docs, is it bad to have a dental abscess on and off for 4 months?

Yes: Recurrence abscess represent a pathogenic entity what will not heal properly in your mouth and the inability of your body to cope with bacterial infection. More and more bone loss will develop. The abscess will grow bigger, affecting adjacent teeth. Pain will ultimately develop as the tooth abscess becoming the periodontal abscess. Tooth loss and bone loss will happened.

Very bad: Having an abscess on and off means it turned chronic , and that damage the surrounding bone to that tooth and it might migrate to the nighbouring teeth or other vital organs, have taken care of asap , see a dentist.

Not good...: It needs to be treated definitively. Can't tell if it is periodontal or pulpal in nature... Either way needs to be treated locally by a dentist before it becomes an emergency. Make the call to save the tooth... It won't get any better on its own.

Dental Abscess: All infections require proper treatment asap! they can spread to other parts of the body, cause other medical problems, and even cause death! the longer they go untreated, the more the chance of local destruction to tissue, the more difficult to control and the greater the risks. I hope this answers your question.

Parulis fistula: is a sign that there is chronic infection and your body is draining it out. Unlike some other types of infection, a dental abscess will not get better on its own. See your dentist for definitive diagnosis and treatment. Good luck.