Airports are already stressful enough for many travelers. Long security lines, early morning flights, baggage rules changing every now and then, and the rush to catch a boarding call can leave people wanting nothing more than to stay comfortable and unnoticed. That is one reason why many passengers wear sunglasses inside airports, especially during early departures or after overnight travel. But travel experts have warnedthat this habit could actually create unnecessary trouble for flyers.As per Unilad, the advice comes from Amanda Parker of flight comparison company Netflights, who spoke about airport behavior after singer and reality star JoJo Siwa was seen traveling through an airport while trying to stay unnoticed in dark sunglasses.Why sunglasses can become an issue inside airportsSecurity checks at airports are strict for obvious reasons. Passengers are already asked to remove sunglasses and hats during identity checks so officers can clearly compare faces with passport or ID photos. But according to Parker, the problem does not always end once travelers pass through security.“There are no rules against wearing hoods or sunglasses in airports - apart from in security zones where they must be removed - but generally, it's strongly discouraged when not necessary as it can raise suspicion, interfere with facial recognition technology, and bring you unwanted attention.”Many people wear sunglasses indoors simply because they are tired, dealing with swollen eyes after little sleep, or trying to relax before a long flight. Still, experts say airport staff may interpret covered faces differently because airports operate under high-security conditions all day.Facial recognition systems can also be affectedParker explained that many airports now use facial recognition systems as part of their screening and boarding process. If a traveler’s face is partly hidden, the system may fail to properly identify them.“Many airports use facial recognition systems at security, so hoods and sunglasses can obstruct the technology's ability to match your face with your passport photo.”“If the system can't make a proper match, you may be pulled aside for manual screening or experience delays in automated lanes.”That means a simple attempt to stay comfortable or low-key could lead to extra checks, longer wait times, or additional questioning from airport staff.