Diseases and Conditions

Find doctor-approved information about symptoms, causes, diagnosis, treatment and prevention of common diseases and conditions.


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All conditions that start with the letter F
  • A man has fainted outdoors


    Fainting happens when your brain does not get enough oxygen. You lose consciousness, or “pass out,” for a brief time…

  • Mother holding a thermometer in the foreground with a sick child sleeping in the background

    Febrile Seizures

    Febrile seizures occur in young children with fevers above 102°F (38.9°C). They aren’t as dangerous as they appear and usually…

  • Fecal Incontinence

    Fecal incontinence is the inability to control bowel movements. This leads to stool (feces) leaking from the rectum at unexpected…

  • Woman sitting backwards on the ground showing her bony spinal column

    Female Athlete Triad

    The female athlete triad is a disorder that affects energy levels, menstrual cycles and bone mass. It happens when you…

  • close-up of pregnant woman with her hands on her stomach

    Fetal Alcohol Syndrome

    Fetal alcohol syndrome is a group of problems occurring in a baby when the mother drinks alcohol while pregnant.

  • Fetal Growth Restriction

    Sometimes babies don’t grow at the normal rate before they are born. Taking care of your body and regular visits…

  • Mother holding a thermometer in the foreground with a sick child sleeping in the background

    Fever in Infants and Children

    A baby or infant's first fever can be scary. Learn how to take your child’s temperature, how to bring down…

  • Fibromyalgia

    Fibromyalgia is a syndrome that causes muscle pain and general fatigue.

  • A little girl in bed with a thermometer in her mouth

    Fifth Disease

    Fifth disease is a mild viral infection caused by human parvovirus B19. About half of people get fifth disease sometime…

  • Girl walking over balancing pods during physical therapy for flat feet

    Flat Feet

    Flat feet is a common condition in which one or both feet don’t have normal arches. This condition can happen…

  • Flatulence/Gas

    Flatulence is another name for gas. It happens when air stays in your abdomen after you eat. It can be…

  • allergy food

    Food Allergies

    A food allergy is an abnormal reaction by your immune system to a food. The reaction can be mild or…

  • A man sitting on the couch and vomiting into a green bucket

    Food Poisoning

    Food poisoning is a primarily intestinal illness that occurs when you eat or drink something that contains harmful bacteria, viruses,…

  • Food Poisoning | Mushroom Poisoning

    What is mushroom poisoning? People are poisoned each year after eating mushrooms from their yard or outside locations. These mushrooms should not to be eaten. It’s difficult to tell which mushrooms can be eaten and which cannot. Poisonous mushrooms can make you sick

  • Portrait of father and son outdoors.

    Fragile X Syndrome

    What is Fragile X syndrome? Fragile X syndrome is a genetic disorder. It is most often passed on from a parent to a child at the time the child is conceived. The disorder causes intellectual and developmental disabilities. This means it affects a person