Yes, you are absolutely allowed to pack tweezers in your carry-on bag according to both TSA and international aviation security guidelines. Tweezers are considered a personal grooming tool rather than a dangerous weapon. While most standard eyebrow and precision tweezers are perfectly fine, security officers do have the discretion to confiscate any item they deem potentially hazardous; however, this is extremely rare for standard tweezers. To ensure a smooth experience through the security checkpoint, it is a good idea to keep your tweezers in a small toiletry kit or grooming pouch rather than loose in your bag. If you are carrying specialized medical tweezers or industrial-sized tweezers that exceed 7 inches in length, you might consider packing them in your checked luggage just to avoid any unnecessary secondary inspections or delays at the X-ray machine.