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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 C
  • doctor holding patient’s hand

    Cancer

    Cancer is a collection of many diseases that all involve the growth of abnormal cells. Some common forms are skin…

  • Close-up of child with canker sore on inside of lip

    Canker Sores

    Canker sores are small, thin sores in your mouth. You might get them on the inside of your lips or…

  • A woman having chest pains, with her hands over her heart

    Cardiomyopathy

    Cardiomyopathy is a disease of the muscles in the heart. It causes your heart muscles to become enlarged. This can…

  • A man working at a computer, grabbing his right wrist in pain

    Carpal Tunnel Syndrome

    Carpal tunnel syndrome is a painful disorder that occurs when the tissues in your wrist get swollen or inflamed and…

  • fluffy domestic cat stretches its paw and claws in the air

    Cat-Scratch Disease

    Cat-scratch disease is an infection you can get after a cat scratches, bites, or licks you. It is caused by…

  • Celiac Disease

    Celiac disease is a digestive disorder that causes problems when you eat foods with gluten, such as wheat, rye and…

  • A doctor bandaging a patients hand to prevent a skin infection

    Cellulitis

    What is cellulitis? Cellulitis is a skin infection that is caused by bacteria. It is a common infection but can become a serious condition if not treated. Most of the time, cellulitis affects the skin on your lower legs. But it can appear anywhere

  • group of early teens sitting together playing on phones

    Central Precocious Puberty

    Central precocious puberty, also known as gonadotropin-dependent precocious puberty, occurs when girls less than 8 years old and boys less…

  • laughing young boy with cerebral palsy sits in his wheelchair next to his sister

    Cerebral Palsy

    Cerebral palsy is a group of neurological disorders that affect body movement and muscle coordination. It usually appears in infancy…

  • A woman clutching her cervix in pain

    Cervical Cancer

    Cervical cancer is abnormal growth of cells in a woman’s cervix. Cervical cancer is almost always caused by the human…

  • Cervical Dysplasia

    Cervical dysplasia is when there are abnormal, or precancerous, cells in and around a woman’s cervix. This doesn’t mean you…

  • Young woman massaging neck, which is in pain

    Cervical Dystonia

    Cervical dystonia is a neurological disorder that causes your neck muscles to contract involuntarily. This can make your head lean…

  • Man suffering from neck pain and stiffness holds neck

    Cervical Spondylotic Myelopathy (CSM)

    Cervical spondylotic myelopathy (CSM) is a compression of the spinal cord in your neck. A compression means pressure, pinching, or…

  • Toddler with chickenpox lying on stomach

    Chickenpox

    Chickenpox is a highly contagious disease caused by a virus. It once was a common childhood disease until a vaccine…

  • Chlamydia

    Chlamydia

    Chlamydia is a bacterial infection that affects both men and women. It is spread through oral, vaginal, or anal…

  • Lung Symptoms

    Chronic Bronchitis

    Chronic bronchitis is an inflammation in the airways of the lungs that lasts longer than 3 months. It is most…

  • Chronic Cough

    A cough is chronic when it lasts for 8 weeks or more. A chronic cough can be a symptom of…

  • A woman sitting in front of her computer, talking on her cell phone, and yawning

    Chronic Fatigue Syndrome

    Chronic fatigue syndrome is a disease that causes extreme fatigue that lasts for more than 6 months and interrupts daily…

  • Young male patient sleeping in hospital bed while receiving dialysis treatment

    Chronic Kidney Disease (CKD)

    Chronic Kidney Disease involves progressive damage to your kidneys caused by high blood pressure, diabetes and heart disease.

  • Chronic Obstructive Pulmonary Disease (COPD)

    COPD is a progressive disease that makes it hard for you to breathe. The two main types of COPD are…

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