Neurological symptoms—which may be signs of a problem with the nervous system—can affect many body functions. Symptoms may include:

• Numbness, weakness, or lack of movement in your face, arm, or leg, especially on only one side of your body.
• Trouble seeing in one or both eyes.
• Trouble speaking.
• Confusion or trouble understanding simple statements.
• Problems with balance or coordination (for example, falling down or dropping things).
• Seizures.