A blister is a small pocket of fluid in the upper skin layers caused by injury, pressure or inflammation. Blisters generally should not be popped or burst, as this can lead to infection.

Blisters - Better Health Channel


Chickenpox is a highly contagious viral disease where the main symptom is a blistering skin rash. Chickenpox is most common in children and babies and can be dangerous in adults. A vaccine is available.

Chickenpox - Better Health Channel

Cold sores

Cold sores are a skin infection caused by the herpes simplex virus. They are painful or itchy fluid-filled blisters on the lips and face. Cold sores are highly contagious.

Cold sores - Better Health Channel

Colds, coughs and flu

Colds are very common, especially during winter. Most colds are caused by a virus and can be easily managed at home with over-the-counter medications and home remedies. Influenza (flu) is more serious and a vaccine is available.

Colds explained – Better Health Channel

Flu (influenza) – Better Health Channel


Conjunctivitis is an eye infection caused by bacteria or a virus.

Conjunctivitis – Better Health Channel


Constipation is when you have hard, dry bowel motions (poo).

Constipation – Better Health Channel


Clinical depression is different from when we feel sad or moody. Feelings of disappointment or loss affect everyone sometimes but depression can last a long time and have serious consequences.

Depression – Reach Out!



Fever is a rise in body temperature, usually caused by infection. Normal body temperature is around 37°C but can vary. A mild fever (up to 39°C) can help the immune system to get rid of the infection. Most cases of mild fever resolve by themselves within a couple of days.

Fever – Better Health Channel

Gastroenteritis (gastro)

Gastroenteritis is an illness triggered by the infection and inflammation of the digestive system. Symptoms include abdominal cramps, diarrhoea and vomiting. Some of the causes include viruses, bacteria, bacterial toxins, parasites, particular chemicals and certain drugs.

Gastroenteritis – an overview – Better Health Channel

Glandular fever

Glandular fever is a viral infection that causes a disease similar to influenza. It is a serious condition and very contagious.

Glandular Fever – Better Health Channel

Hay fever

Hay fever is a common condition where irritating particles in the air cause allergic reactions of the nose, throat and eyes.

Hay fever – Better Health Channel


Headaches have many causes but the most common are tension, stress, migraine and dehydration.

Headache – some causes explained – Better Health Channel


Hives is a red, itchy, raised skin rash, which can look like a group of mosquito bites.

Hives – explained – Better Health Channel

Late or missing periods

A late period is five or more days overdue according to your usual menstrual cycle. A missed period is when there is no flow for six or more weeks from the last period.

Menstrual cycle – Better Health Channel

Painful periods

Some women have very painful periods, possibly because the uterus works too hard to expel the menstrual blood.

Menstruation – dysmenorrhoea – Better Health Channel

Safer sex

Having sex does not guarantee you will catch a sexually transmissible infection (STI). But certain types of sex put you at a far greater risk.

Safe sex - Better Health Channel

Sore throat

Sore throats can be caused by an inflammation of your tonsils. They can also be from damage and inflammation to the throat wall caused by coughing and sneezing.

Sore throat – Better Health Channel

Sports injuries

Sports injuries are caused by overuse, direct impact or too much force for the injured body part to withstand.

Sports injuries – Better Health Channel

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