Whether a person with dementia can safely be left alone depends on the stage of the condition and their individual circumstances. In the early stages, many people can manage short periods alone safely, particularly if they have a structured routine, a safe environment, and a way to contact someone if needed. As dementia progresses, the risks of leaving someone alone increase significantly. These include falls, leaving the gas on, getting lost, or becoming severely distressed. In the moderate to advanced stages, most dementia patients should not be left alone for extended periods. A care needs assessment by social services can help determine the appropriate level of supervision and identify what support is needed.