My 4yr old has a sore throat and a rash all over his body thats getting worse?

Viral pharyngitis: Sounds like he may have a viral pharyngitis and the rash could be part of the overall viral illness however it is important to rule out other important causes of the rash such as Meningitis. It is important to rule out this dangerous complication and the best way would be a review with your family doctor or urgent care clinic as soon as you can

It happens: The more important issue to exclude with a throat infection & rash would be strep A infection. In some strains it will produce a generalized faint red sandpapery rash that emerges within 12-18 hours of fever.Untreated strep can lead to rheumatic fever in a month. There are other causes of both, but a simple office quick test can verify or exclude strepA.

Throat swab: In NZ we stil have very high rates of rheumatic heart disease which is a complication caused by a particular kind of bacterial infection. I people who are in high risk categories (particularly Maori or Pacific Island) we like to take throat swabs to check for this bacteria (Strep throat) and if it is positive we would give antibiotics. It might be worth getting it checked.

Viral infection : Fever , runny nose , sore throats and rashes indicate viral infection. Paracetamol, rest , and fluids should help . See doctor if not wetting nappies, vomiting , too drowsy or you are concerned as parent .

See doctor: It is important to decide if the child is acutely unwell as he may have serious infection in the flap in the back of your throat, diphtheria or abscess in the throat especially if there is swelling to one side. The rash can be from viral illness of from other more serious causes as septicaemia. Recent history of medication intake is important especially if the rash on the skin is sever see doctor

More info needed: Important to have examination to exclude streptococcal tonsillitis and may need throat swabs done. However may also be viral with the rash. Plus if has been commenced on antibiotics and has subsequently developed rash then may have a drug rash/reaction. Easiest to sort out with a clinical assessment Recommend see doctor.