What are possible causes of a concussion?
A concussion is usually caused by a blow to the head. A concussion may happen because of a fall, a motor vehicle crash, or a sports injury. Sometimes being forcefully shaken may cause a concussion. What are the signs and symptoms of a concussion? Every concussion is different. Right after the injury, you may seem dazed, lose consciousness, or have a seizure (convulsion). Other symptoms may show up right away. Some symptoms may not happen for days or weeks after the concussion. Symptoms of a concussion may last anywhere from a few hours to several weeks. After a concussion, most people get better within four weeks. After the injury, you may have one or more of these symptoms: • Mild to moderate headache. • Dizziness or loss of balance. • Nausea (feeling sick) or vomiting (throwing up). • Change in mood (such as restlessness or irritability). • Trouble thinking, remembering things, or concentrating (giving full attention to one thing for a period of time). • Ringing in the ears. • Drowsi
