Is a temporary diminution of the irritability or functioning of organs, tissues, or cells after excessive exertion or stimulation.

Symptoms: Possible Problems: What To Do: Fatigue. Cancer. Consult doctor. Appetite loss. Disorder of red blood See Anemia (all charts). Weight loss. cells.

Symptoms: Possible Problems: What To Do: Fatigue, plus 2 or more of Virus infection. See Mononucleosis, following: Infectious. Appetite loss. Fever. Headache. Painful swelling in neck, armpit or groin. Jaundice (yellow skin and eyes). Sore throat.

Symptoms: Possible Problems: What To Do: Fatigue. Adverse reaction or side Consult doctor about Use of prescription or non- effect of drug. prescription drug. prescription drug. Discontinue use of non- prescription drug.

Symptoms: Possible Problems: What To Do: Fatigue. Underactive thyroid gland. See Hypothyroidism. Coarse skin and hair. Low voice. Loss of sex drive. Puffy face.

Symptoms: Possible Problems: What To Do: Fatigue. Bacterial or viral infection. Consult doctor. Fever. Headache, plus any of following: Nausea, vomiting or diarrhea. Drowsiness. Cough. Sore throat. Pain in neck. Aches in bones or joints. Skin rash. Pain in back. Painful urination.

Symptoms: Possible Problems: What To Do: Fatigue in woman at Normal occurrence with See Menopause. menopause. decreasing estrogen level Appetite loss. of menopause.

Symptoms: Possible Problems: What To Do: Fatigue. Dietary deficiency of Consult doctor. Pregnancy. pregnancy, particularly of Eat extra protein foods. Shortness of breath. protein, calcium, vitamins Drink 2 extra glasses of or iron. skim milk daily. Take iron supplement and prenatal vitamin supplement.

Symptoms: Possible Problems: What To Do: Fatigue. Effect of stress. See Depression. Depression or anxiety. See Anxiety.

Symptoms: Possible Problems: What To Do: Ongoing fatigue for several Unknown infection or See Chronic Fatigue months. problem. Syndrome. Numerous other symptoms.