Another common symptom is a so-called brain fog. In general, a cognitive function is responsible for knowing the world around better and gaining new skills. In the case of patients with dysautonomia, their ability to educate is limited by the poor short-term memory and some other obstacles. They find it hard to concentrate as well as communicate with other people as they are not always sure which word to choose and how to build sentences correctly. As a result, the patients fail to study and work effectively.