Enlargement of the thyroid gland may be caused by autoimmune disorders, an iodine-poor diet, pregnancy-related hormones and other factors.
Disease
Golfer's elbow
Golfers, tennis players and others who repeatedly use their wrists or clench their fingers can develop this painful condition.
Disease
Gonorrhea
This common sexually transmitted infection often causes no symptoms. Learn more about treatment, prevention and possible complications.
Disease
Gout
This type of arthritis can cause sudden, severe attacks of pain, swelling, redness and tenderness — often in the big toe.
Disease
Granuloma annulare
Learn about this painless skin condition mainly affecting young adults in which bumps form a ring. The rash can be long lasting or recur after treatment.
Disease
Granulomatosis with polyangiitis
This disease can cause swelling in the blood vessels of the nose, sinuses, throat, lungs and kidneys. Prompt treatment is key.
Disease
Graves' disease
Learn about the symptoms, causes and treatment of this immune system condition that results in too much thyroid hormone.
Disease
Group B strep disease
This common type of bacteria is often harmless in healthy adults. But it can cause serious illness in newborns and adults with certain long-term conditions, such as diabetes.
Disease
Growing pains
Learn about this common condition involving leg pain in children, including growing pain symptoms and how to ease discomfort.
Disease
Growth plate fractures
Growth plate fractures — This common childhood bone injury often needs immediate treatment as it can result in a shorter, longer or crooked limb.
Disease
Guillain-Barre syndrome
This rare autoimmune condition affects the nerves, causing weakness and tingling in the arms and legs that quickly spreads throughout the body.
Disease
Monoclonal gammopathy of undetermined significance (MGUS)
When bone marrow produces an unusual protein in the blood, it can sometimes lead to certain types of blood cancer.