Recession is a common gum problem, especially if you have been ignoring your dental health for long or you have protruding teeth.
The layer on the exposed tooth is most likely to be hard deposits containing microorganisms, which will cause further gum disease.
Next Steps
Consult a good dentist
Health Tips
Regular check up and maintenance is much better than treatment. Now get the issue treated and then move to the 6 monthly preventive check up pattern.