What the Mouth and Teeth Do. The first step of digestion involves the mouth and teeth. Food enters the mouth and is immediately broken down into smaller pieces by our teeth. Each type of tooth serves a different function in the chewing process. Incisors cut foods when you bite into them. The sharper and longer canines tear food.
CFS is most common in women ages 30 to 50. The hallmark symptom is persistent and profound fatigue, which often worsens after physical or mental exertion. Symptoms may also include muscle aches, headache, and extreme fatigue. The main symptom of CFS is extreme tiredness that is: New.
Frequent weakness should be cause for concern at any age. Chronic fatigue syndrome -- a disorder that causes extreme fatigue -- affects more than one million people in the United States. Schedule a physical examination if you always feel tired or weak -- this could be a sign of a serious medical condition.