hello and welcome to HCM forum,
i would like to inform you that whenever a wisdom tooth does not erupt fully, due to food accumulation within the gum tissue surrounding it causes a dental condition 'pericoronitis'.
In such a condition you should visit your dentist
, sometimes the wisdom tooth is unable to erupt which causes the gums around it to swell .
I will advise you to perform warm saline rinses(3-4 times/day),
use an antibacterial mouth wash(twice/day),
Do not worry, the gap will fill up on its own once the tooth fully erupts,
In some cases ,if the dentist feels that the tooth needs to be extracted, even then the space gets filled up on its own .
i hope this answer was useful,
i wish you good health.