leads to various types of bacterial and fungal infections of the mouth.Bacterial infection can lead to swollen and bleeding gums
leading to gingivitis.Similarly the chances of fungal infection ( thrush ) are increased in uncontrolled diabetics.
Dryness of mouth can be caused not only by uncontrolled diabetes but also because of various medications like diuretics for hypertension
or anti depressants.
Dry mouth in itself can increase the chances of various infections of mouth because of absense of saliva sphicter helps in cleaning of mouth.
Observe proper hygiene,brush your teeth regularly,avoid tobacco and smoking and control your diabetes meticulously.
Visit your dentist