It's generally not recommended to use a whitening pen every day.
Whitening pens contain ingredients that can irritate sensitive gums and teeth. Using them too frequently can lead to discomfort, sensitivity, and even damage to your enamel.
The effectiveness of whitening pens also varies. While they can brighten your smile, they may not provide the same dramatic results as professional whitening treatments.
If you're looking to whiten your teeth, it's best to consult with a dentist. They can assess your individual needs and recommend the most appropriate whitening method for you.