<s>[INST] Hi, I'm 19 and I noticed today that I have what looks to be a small hole--maybe 1.5 mm across, plus maybe a tiny one that might forming between the next pair of teeth to the left--in the gums immediately to the left of the piece of skin stretching from my lower lip to the teeth in the lower front part of my jaw.  A few months before this all I'd noticed was that my gums were receding a little to where I could see the dentin, especially on my lower canines, and I've been using a softer tooth brush since then.  Can anyone tell me what this might be from and how I can fix it?  Thanks. [/INST] Hello!Thank you for posting here.This can be due to poor oral hygiene.You did not mention your normal hygiene status.Also, how is your teeth positioned.Irregularly placed teeth can be a cause.Do not brush hard.You did the right thing by changing to a softer tooth brush.Brush gently.Maintain good oral hygiene.Apply gum tone gel on the gums.If your teeth are irregularly placed, crooked i mean, this  must be corrected first.Gum recession at your age is not very frequent.You are 19 and you must adopt health oral hygiene routine.Get scaling done every 4- 6 months and floss daily.Concentrate on the lower teeth, also on the inside while brushing and flossing.Regards. </s>