Children experience tiredness from time to time, especially during their developmental years when they have growth spurts. Generally a nap and some rest will help to cure fatigue. If your child has an overwhelming need to sleep even after adequate rest, it could become problematic.

If your jawbone disappears after eating certain foods, you may have a food allergy. Your lymph nodes are glands located directly under your jawbone and may become swollen when you’re sick.

Yawning is a natural and involuntary bodily function that can be caused by fatigue, boredom or even a response to someone else yawning. But excessive yawning—which DiagnoseMe.com describes as one to four a minute—can be a sign that your diet is unbalanced, you have an allergy or a medical condition.

On the average, 0.2 percent of ELISA tests give a false positive HIV test result that are then proven incorrect by a Western Blot test, notes Goaskalice.com, the Columbia University student health website.

Lymph nodes are small rounded or bean-shaped masses of lymphatic tissue surrounded by a capsule of connective tissue. You have some 600 of them throughout your body, with the majority in your head and neck.

Autoimmune disorders such as lupus and rheumatoid arthritis can cause a wide array of seemingly unrelated symptoms. Lupus, also known as systemic lupus erythematosus, is a systemic illness and can affect any organ system.

Free radicals are dangerous molecules that can accumulate in your body and cause serious health problems, like cancer. According to the National Cancer Institute, free radicals are formed with incomplete electron shells, which makes them more chemically reactive and damaging to your health.

Most toddlers sleep 10 to 13 hours a day, so it’s possible your toddler is not getting enough sleep if he skips naps or wakes up frequently at night. Mononucleosis, hypothyroidism and anemia are possible causes of your child’s consistent fatigue. Consult with your doctor if your toddler’s symptoms seem excessive.

Vitamin deficiencies tend to go hand in hand with many chronic diseases and conditions, such as lupus. Vitamins and minerals are essential nutrients that your body needs to function properly, and without the right balance of vitamins and nutrients, deficiencies occur.

Fatigue can be a feeling of sleepiness or lack of energy. Many of you have experienced it for a short while, or maybe for a long period of time. Fatigue can be caused by a number of reasons such as stress, lack of sleep, a medical disorder, intense exercise or even your diet.

If you have leukopenia, your levels of infection-fighting white blood cells, or leukocytes, are too low. Because neutrophils are the most common white blood cell, neutropenia also is used to describe low white cell counts.

Menstruation can be an unpleasant part of life for women. For most, however, it is no more than an inconvenience. For some, however, the symptoms can take over your life and make it difficult to function, especially if you suffer from fatigue.