The main symptoms of scabies are intense itching and a rash in areas of the body where the mites have burrowed.

The itching is often worse at night, when your skin is warmer. It may take 4 to 6 weeks before the itching starts because this is how long it takes for the body to react to mite droppings.

Symptoms will start within 1 to 2 days if you’ve had a scabies infection in the past. This is because your immune system will have learned to respond to a scabies infection.

The scabies rash consists of tiny red spots. Scratching the rash may cause crusty sores to develop.

Burrow marks can be found anywhere on the body. They’re short (1cm or less), wavy, silver-coloured lines on the skin, with a black dot at one end that can be seen with a magnifying glass.
Scarlet fever usually follows a sore throat or a skin infection, such as impetigo, caused by particular strains of streptococcus bacteria.

Initial symptoms usually include a sore throat, headache and a high temperature (38.3C/101F or above), flushed cheeks and a swollen tongue.

A day or two later the characteristic pinkish rash appears. It usually occurs on the chest and stomach before spreading to other areas of the body, such as the ears and neck.

The symptoms of scarlet fever usually develop two to five days after infection, although the incubation period (the period between exposure to the infection and symptoms appearing) can be as short as one day or as long as seven days.

The rash feels like sandpaper to touch and it may be itchy. On darker skin the rash may be more difficult to see although its rough texture should be apparent.