Why can septicaemia cause spots and bruises?
In septicaemia, the bacteria release toxins into the blood, which break down the walls of the blood vessels allowing blood to leak out under the skin. This leaking causes marks on the skin. At first, you might see a rash of red or brown pin-prick spots, which can develop into purple bruises, blood blisters or blood spots. These spots do not fade under pressure (see the tumbler or glass test below).
