Brain fog
Brain fog is a type of transient cognitive dysfunction that comprises a constellation of symptoms that impair intellectual functioning to a level that interferes with daily activities, commonly including forgetfulness, mental slowness, difficulty thinking or focusing, a perceived slowing of mental processing speed, inability to find the right words, a sensation that the mind went blank or is "cloudy". Brain fog tends to recur and may be triggered by factors such as physical fatigue, lack of sleep, and prolonged standing or may appear to occur spontaneously.
What is Brain fog?
Brain fog is a symptom that people may experience for many reasons. It can be related to infections, chronic conditions, injuries, medication effects, or other health changes. The presence of this symptom alone does not diagnose any condition.
If you have Brain fog that is severe, persistent, or accompanied by other warning signs, contact a qualified healthcare provider.
Possible conditions associated with Brain fog
The following conditions have been associated with Brain fog. Only a health professional can determine the underlying cause.
Chronic Fatigue Syndrome
A disorder characterized by profound fatigue that does not improve with rest and is worsened by physical or mental activ...
Fibromyalgia
A chronic disorder characterized by widespread musculoskeletal pain, fatigue, and sleep, memory, and mood disturbances.
Postural Orthostatic Tachycardia Syndrome
A disorder of the autonomic nervous system in which standing up causes an abnormal rise in heart rate, leading to dizzin...
Secondary hypoparathyroidism due to impaired parathormon secretion
Secondary hypoparathyroidism due to impaired parathormon secretion is a medical condition that may be associated with va...
Visual snow syndrome
Visual snow syndrome is a medical condition that may be associated with various symptoms and signs.
Related symptoms
When to seek medical care
Seek urgent care if Brain fog is severe, sudden, or occurs with chest pain, difficulty breathing, confusion, severe weakness, or other serious symptoms.