The Metropolitan Police are appealing for information on the whereabouts of Dion Hall, 45, from Sydenham who has not been seen for nearly 24 hours.
Hall is described as a black woman of large build and was wearing navy trousers, a striped scarf, a long black coat and black trainers.
She was last seen at her home in Lawrie Park Road, Sydenham, at 4 pm on Sunday afternoon. Her carers said that she may have been heading towards the Bromley Area.
The police say they are particularly concerned to locate Hall as she requires regular medication for health issues. She is known to visit railway stations, airports and hospitals.
Police are asking anyone who may have seen Dion Hall to call the police on 101.