Gum disease
What are the signs? Reddish gums, yellow/brown deposits around the teeth, bleeding on brushing, bad breath, in severe cases it might even cause mobility of teeth.
Treatment: Professional cleaning sessions to clear all deposits around teeth along with use of medicated mouth wash and gum ointments.
Does cleaning cause increased mobility of teeth? No, neglect towards cleaning causes damage to gums and bone which in turn compromises support to teeth and causes mobile teeth. This mobility might not be felt due to the deposits around the teeth which is calcified plaque but the damage continues.
Does cleaning increase sensitivity of teeth? Sometimes if the damage due to gum disease exposes the root surface, which might cause transient sensitivity.