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Gum disease

Periodontitis (per-e-o-don-TIE-tis), also called gum disease, is a serious gum infection that damages the soft tissue around teeth. Without treatment, periodontitis can destroy the bone that supports your teeth. This can cause teeth to loosen or lead to tooth loss.

Periodontitis is common but can usually be prevented. It's often the result of not taking care of your mouth and teeth. To help prevent periodontitis or improve your chance of successful treatment, brush at least twice a day, floss daily and get regular dental checkups.

Guillain-Barré syndrome

Guillain-Barre (gee-YAH-buh-RAY) syndrome is a rare disorder in which your body's immune system attacks your nerves. Weakness and tingling in your hands and feet are usually the first symptoms.

These sensations can quickly spread, eventually paralyzing your whole body. In its most severe form Guillain-Barre syndrome is a medical emergency. Most people with the condition must be hospitalized to receive treatment.

Growing pains
Growing pains are deep cramping or aching pains in your child's limbs, specifically their legs. The pain typically affects both legs and occurs at night. 
Despite the condition name, there's no evidence that growth is painful. The pain is likely due to muscle overuse during the day.
Pain can be in the thighs, calves or backs of the knees.
A heating pad or massage can help reduce the pain.
Group B strep
An infection caused by a common bacterium (group B streptococcus). The infection is usually harmless in adults, but can be dangerous in newborns and adults with chronic conditions, such as diabetes or liver disease.
Symptoms in newborns include fever, trouble feeding and lethargy. Adults who are immunocompromised may get a urinary tract or blood infection or pneumonia.
Granuloma annulare
What is granuloma annulare? Granuloma annulare is a benign skin condition characterized by small, raised bumps that form a ring with a normal or sunken center. The cause of granuloma annulare is unknown and it is found in patients of all ages. The condition tends to be seen in otherwise healthy people.
Goitre
A goitre commonly develops as a result of iodine deficiency or inflammation of the thyroid gland.
Not all goitres cause symptoms. Symptoms that do occur might include swelling and coughing. Rarely, symptoms may include throat tightness or trouble breathing.
A small goitre that doesn't cause symptoms may not need treatment. In some cases, medication or surgery is required.
Glue ear
Glue ear occurs when fluid builds up inside your middle ear and doesn't go away. The fluid gets thicker the longer it stays there and can become sticky like glue. The medical name for glue ear is 'otitis media with effusion'.