Infection

Very common

Invasion of body tissues by pathogens such as bacteria, viruses and fungi

Symptoms may include:

• Fever
• Malaise
• Body pain
• Inflammation
• High white blood cell count

Autoimmune disorders

Common

Conditions where the immune system mistakenly attacks the individual's own body

Symptoms may include:

• Fever
• Fatigue
• Swollen glands
• Rashes
• Muscle, joint pain
• Inflammation

Insect bites and stings

Common

A bite of an insect such as a bee or mosquito, which causes irritation and rashes. Some insects inject formic acid, which can cause an immediate skin reaction causing redness and swelling in the bite area.

Symptoms may include:

• Skin rash or redness
• Itching
• Stinging sensation or swelling...

Rheumatoid arthritis

Common

A chronic inflammatory disease that affects the joints. This results in painful joints, swelling and stiffness in the joints.

Symptoms may include:

• Swollen joints
• Accumulation of fluid in the ankles
• Morning stiffness...

Sepsis

Common

An infection of the blood stream resulting in a cluster of symptoms such as drop in a blood pressure, increase in heart rate and fever.

Symptoms may include:

• Generalised body swelling
• Faster heart rate
• Reduced urine output...