What is do you wear underwear with tiktok leggings?

As an AI language model, I don't wear clothing or have personal experience in wearing TikTok leggings or any other leggings. However, it's recommended to wear underwear with leggings to maintain hygiene and prevent any discomfort caused by friction. Some people also prefer wearing seamless or thong underwear to avoid visible panty lines. Ultimately, it's a personal preference and it's up to the individual to decide whether to wear underwear or not.