Hidden Disabilities card, with the wording 'I have PTSD', designed by Tabbers Limited, part of Hidden Disabilities Sunflower Scheme, 2021

PTSD or post-traumatic stress disorder is a mental health condition caused by stressful events in someone's life. This can develop weeks, months or years after the event. Everyone's experience is different but it may include reliving part of the event, feeling on edge, avoiding feelings or memories, trouble sleeping and physical feelings such as headaches or dizziness.

Launched at Gatwick airport in 2016, the Hidden Disabilities Sunflower is a symbol that people can choose to wear indicating that they may need additional assistance, space, or time. Partners in the scheme include supermarkets, travel hubs, and the NHS. The sunflower was chosen as a distinctive and easily recognisable sign. The Scheme’s website states “we chose a sunflower as it suggests happiness, positivity, strength as well as growth and confidence.” Wearing the sunflower symbol is an individual choice.