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Loss of appetite    
Fatigue    
Fever
Headache    

20 possible causes of "Loss of appetite, Fatigue, Fe..."
Symptoms:
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Pain
  • Wheezing
1. Cold and Flu Overview
Overview Colds (common colds) and the flu (influenza) are contagious infections that affect the respiratory system. Both are airborne illnesses, spread through coughing and sneezing. Colds typically are confined to th...
Symptoms:
  • Pain
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Watering eyes
2. 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!
Symptoms:
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Hyperventilation
  • Dark urine
3. Heat Emergencies
Heat emergencies are health crises caused by exposure to hot weather and sun. Heat emergencies have three stages: heat cramps, heat exhaustion, and heatstroke. All three stages are serious. If left untreated, the firs...
This condition is considered a medical emergency. Urgent care may be required.
Symptoms:
  • Swollen lymph nodes
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Perianal rash
4. Acute HIV Infection
Acute HIV infection is also known as primary HIV infection or acute retroviral syndrome. This condition occurs within the first two to four weeks after someone is infected with the human immunodeficiency virus. It i...
Symptoms:
  • Headache
  • Loss of appetite
  • Fatigue
  • Fever
  • Muscle pain
  • General weakness
5. Pneumonia
Pneumonia is an infection in one or both lungs. The infection may be caused by fungi, bacteria, or viruses. Pneumonia causes inflammation in your lung's air sacs, also referred to as alveoli. The alveoli fill with flui...
Symptoms:
  • Groin lump
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Neck lump
6. Infectious Mononucleosis
Infectious mononucleosis, often called "mono," is caused by the Epstein-Barr virus (EBV). It typically occurs in teenagers, but you can get it at any age. The virus is spread through saliva, which is why some peopl...
Symptoms:
  • Chronic pain
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Unintentional weight loss
7. Systemic Lupus Erythematosus
The immune system normally fights off dangerous infections and bacteria to keep the body healthy. An autoimmune disease occurs when the immune system attacks its own body because it confuses it for something foreign...
Symptoms:
  • General weakness
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Joint stiffness
8. Temporal Arteritis
Temporal arteritis is a condition in which the temporal arteries, which supply blood to the head and brain, become inflamed or damaged. It is also known as cranial arteritis or giant cell arteritis. Although thi...
Symptoms:
  • Combative behavior
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Paranoia
9. Alcohol Withdrawal Syndrome
Alcohol withdrawal syndrome (AWS) is the name for the symptoms that occur when a heavy drinker suddenly stops or significantly reduces their alcohol intake. With AWS, you may feel mild anxiety and fatigue. You may als...
This condition is considered a medical emergency. Urgent care may be required.
Symptoms:
  • Loss of appetite
  • Fatigue
  • Fever
  • Headache
  • Abscess of chest wall
  • Fertility problem
10. Tuberculosis
Tuberculosis (TB) is a potentially fatal contagious disease that can affect almost any part of the body but is mainly an infection of the lungs.

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