There are a few things you need to know before making the decision to change your age on TikTok. First, there is no set age for when you can start using the app. Second, there is no one-size-fits-all answer to this question; it depends on your age and health. Third, if you decide to change your age on TikTok, be sure to do so in a way that is safe and legal. Finally, be sure to consult with your doctor or other healthcare professionals before making any changes to your health or age on TikTok.