Motion intolerance or motion sickness or seasickness/air sickness or maldebarkment syndrome are all types of motion/balance confusion. Motion sickness is a common, normal reaction to complex motion. When it complicates other balance disorders, recovery is often more difficult. Common ways for motion intolerance to become apparent include: riding in the back seat of the car, amusement rides, air travel, and boat travel. Less commonly, shopping in grocery stores, watching movies, and watching traffic may cause similar symptoms. The problem becomes more annoying when tired, stressed, or ill. Improvement demands exercise that causes at least some dizziness. Sometimes, medications may help individuals get past the nuisance symptoms.