Two landmarks will be lit up purple today to raise awareness about a debilitating condition.

Brighton Palace Pier and Worthing Town Hall are just two of more than 80 landmarks across the country that will be cast in violet lights to mark Postual Tachycardia Syndrome (Pots) awareness day.

The condition is an abnormal response by the autonomic nervous system to the upright posture.

On standing up, patients experience multiple symptoms that include palpitations, chest pains, light-headedness, blackouts, nausea, fatigue, difficulty thinking, gut problems, headaches, tremulousness, sleep abnormalities and more.

Pots tends to arise in teenage and young adulthood but can affect people of all ages.

A spokeswoman for Pots UK, the charity which supports people with the condition, said: “Raising awareness of Pots is even more important than ever, as we are becoming aware of an increasing number of reports of people developing Pots and other types of autonomic dysfunction after contracting Covid.

The charity is doing everything it can to support GPs and hospital specialists as well as working with the NHS to update its guidance and offer a safe space of education, support and community to those suffering from Pots or extended friends and family members who want to help understand more about the condition.