- Medically unexplained symptoms (MUS): A common condition where symptoms like pain, fatigue, headaches, dizziness, or changes in gut motility don’t have a clear medical cause. MUS can be related to psychological issues like anxiety or depression, or they could be part of a poorly understood syndrome like chronic fatigue syndrome (CFS), fibromyalgia, or irritable bowel syndrome (IBS). Treatments include cognitive behavioral therapy (CBT), graded exercise therapy, and stress reduction techniques.
- Vitamin deficiency or dehydration: These can cause you to get sick suddenly.
- Immune system issues: If you get sick often, it could be due to your immune system function.
- Fainting or seizures: Fainting, also known as syncope, can cause a loss of consciousness and sudden involuntary movements.
- Anxiety: Anxiety can be caused by a number of health conditions, including heart disease, diabetes, or hormonal imbalances. Not getting enough sleep can also cause anxiety.