I just had periodontal surgery on my gums. Can I whiten my teeth or is it not advisable?

If the teeth have become very "fleshy" the whitening product on the "necks" of the teeth could inflame the nerve of the teeth since these parts are more porous than normal tooth enamel. In any case, in-clinic whitening, in the hands of a professional, delicately placing the product only on the enamel areas (and protecting the sensitive areas) could obviate the problem and allow you to achieve perfect whitening without any major problem.