Muscle pain, Tired: 39 Possible Causes
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What causes muscle pain and tired? 39 possible conditions

See a list of possible causes in order from the most common to the least.


Common Cold Overview

The common cold is a virus that involves symptoms like sneezing, a runny nose and a headache. Learn the causes, symptoms and treatments for the common cold now!

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Cold and Flu Overview

Common colds and influenza are contagious infections that affect the respiratory system. Both are airborne illnesses, spread through coughing and sneezing. Shared symptoms include headache, cough, sore throat, and more.

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CFS (Chronic Fatigue Syndrome)

Chronic fatigue syndrome (CFS) is a debilitating disorder characterized by extreme tiredness that can't be explained by an underlying medical condition.

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Swine Flu

Swine flu, or H1N1, is highly contagious and can spread quickly from person to person. A simple sneeze may cause thousands of germs to spread through the air. Symptoms are similar to regular influenza.

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What is Fibromyalgia?

Fibromyalgia is a chronic disorder characterized by widespread, unexplained pain in tender points in muscles and joints, including the head, neck, and sides of hips.

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Low Blood Sugar (Hypoglycemia)

This condition is considered a medical emergency. Urgent care may be required.

Hypoglycemia, or low blood sugar, is a potentially dangerous condition that's most common in people with diabetes. Learn what causes it and how to prevent it.

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Malaria is a life-threatening disease. It's typically transmitted through the bite of an infected Anopheles mosquito.

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Systemic Lupus Erythematosus

Systemic lupus erythematosus, the most common form of lupus, is a chronic autoimmune disease that can cause severe fatigue and joint pain. Learn more about it.

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Rheumatoid Arthritis Overview

Rheumatoid arthritis is an autoimmune disease. It causes joint problems. In autoimmune diseases, the immune system mistakes the body's own cells for invaders.

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Hyperparathyroidism is a condition where the parathyroid glands produce too much parathyroid hormone (PTH).

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Hepatitis refers to an inflammatory condition of the liver. It's commonly caused by a viral infection, but there are other possible causes of hepatitis.

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Ebola Virus and Disease

This condition is considered a medical emergency. Urgent care may be required.

Ebola disease is a rare, often fatal illness. One of its late-stage symptoms is a bleeding rash over the entire body.

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Dengue Fever

Dengue fever is a disease that affects much of the tropical region and is caused by one of four dengue viruses. A skin rash between two and five days after the initial fever is a common symptom.

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Temporal Arteritis

Temporal arteritis occurs when the temporal arteries, which supply blood to the head and brain, become inflamed or damaged.

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Polymyalgia Rheumatica

Polymyalgia rheumatica is an inflammatory disorder that causes muscle pain and stiffness. Learn about its symptoms, diagnosis, and treatment.

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Infectious Mononucleosis

Infectious mononucleosis, or mono, refers to a group of symptoms usually caused by the Epstein-Barr virus (EBV).

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Lyme Disease

Lyme disease is an infectious condition transmitted via tick bite. A "bull's eye" rash at the site of the bite is an early symptom of this disease.

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Learn about sarcoidosis and its causes, symptoms, diagnosis, treatment, and potential complications.

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The thyroid gland produces a hormone that controls how your cells use energy (metabolize). Hypothyroidism occurs when the body doesn't produce enough. Untreated, it can cause complications like obesity and heart disease.

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Cellulitis is a common bacterial skin infection. Cellulitis may first appear as a red, swollen area that feels hot and tender to the touch.

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This feature is for informational purposes only and should not be used to diagnose.
Please consult a healthcare professional if you have health concerns.