It is common for teeth whitening procedures to cause tooth sensitivity as a side effect. Despite the fact that at-home whitening strips and kits are safe, they can cause sensitivity if not used according to instructions. The best way to whiten your teeth is to use professional dental services because they use advanced techniques and desensitizers that are safe for your teeth.   A few teeth may be missed when you try whitening your teeth yourself, resulting in an uneven result. By contrast, a dentist can determine how to achieve long-term results that are even and consistent.   The teeth whitening procedure takes about an hour and is quite simple. Same-day results can be achieved with professional treatment without causing damage to your teeth or gums. If you choose professional dental services, you can see results immediately even if you aren't in a hurry.