A cold is a common viral infection of the upper respiratory tract–namely, your nose and throat. A runny or stuffy nose, sneezing, coughing, and sore throat are common…
Common colds and influenza are contagious infections that affect the respiratory system. Both are airborne illnesses, spread through coughing and sneezing. Shared…
Strep throat is a bacterial infection that causes inflammation and pain in the throat. This common condition is caused by group A Streptococcus bacteria.
Acute bronchitis causes coughs that produce mucus. You don't need antibiotics, but bed rest and home care can help.
One life-threatening complication of infection is sepsis, which often occurs in people who are elderly or have weak immune systems. Patches of discolored skin is a…
Fever of unknown origin (FUO) refers to elevated body temperature for which a cause is not found after basic medical evaluation.
Acute HIV infection occurs soon after someone contracts HIV. Learn about its symptoms, diagnosis, treatment, and prevention.
RSV is virus that causes symptoms similar to those of a cold and occurs most frequently in children. Learn about causes and treatment.
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…
Food poisoning occurs when you consume foods contaminated with bacteria, viruses, or parasites. Symptoms are usually uncomfortable but not severe.
Non-Hodgkin's lymphoma (NHL) is a cancer of the lymphatic system that occurs when tumors develop from the lymphocytes, which are a type of white blood cell.
There are two main types of lung cancer: non-small cell and small-cell. Learn about how these lung cancers are caused, your treatment options, and more.
Septic shock is a complication of an infection. It can cause inflammation and could become life-threatening.
A bone infection may occur when bacteria or fungi invade the bone, causing many symptoms, including fever, redness, stiffness, and swelling.
Damage to the liver from excessive drinking can lead to ARLD. Years of alcohol abuse cause the liver to become inflamed and swollen.
The recommended amount of caffeine is usually 400 mg per day for healthy adults. Caffeine overdose may occur if you ingest more than this amount.
Heat emergencies are health crises caused by exposure to hot weather and sun. Heat emergencies have three stages: heat cramps, heat exhaustion, and heatstroke.
A middle ear infection (otitis media) occurs when a virus or bacteria cause inflammation in the area behind the eardrum. It is most common in children.
Pneumonia is an infection of the lungs caused by fungi, bacteria, or viruses. General symptoms include chest pain, fever, cough, and trouble breathing.
Appendicitis is inflammation of the appendix. Here's what it feels like, what causes it, and what tests to expect at your doctor's office.
This feature is for informational purposes only and should not be used to diagnose. Please consult a healthcare professional if you have health concerns.