Can dental hygienist cause damage?

Anyone can: Damage is within the capabilities of anyone, so the short answer to your question would be "yes". However, the intent of state regulation of the dental hygiene profession is to assure that dental hygienists fulfill established minimum standards for skill and training, which will effectively limit the danger of injury due to lack of competence.

Usually no: Dental hygienist are trained to remove tartar from your teeth and give local anesthesia, where side effects can occur. Teeth can be sensitive after they are cleaned, and a desensitizing tooth paste may be needed. Occasionally they may pull a loose filling out , which needs replacing, while they are scaling your teeth. Ask to see the dentist after your cleaning if you think something happened.

Very Unlikely: It is very unlikely that a Dental Hygienist will cause any damage to the teeth and surrounding gum tissue. A patient may experience some discomfort if they do not have good home care and their gum tissue is inflamed prior to their dental visit. It is important to see your hygienist every 3-6 months to maintain a healthy oral environment.