I saw your question exactly 5 weeks after you had posted the question.
Though the answers may not be relevant to your child, it will help those who have similar problem
Swelling in front of the ear and salivary glands swelling, we may assume that it is probably a viral illness, probably mumps
. Of course bacterial infections can also cause the same. Then the blood counts would have come with evidence for bacterial infections.
you are describing appears to be purpuric patch which needs medical evaluation. This means that the blood has leaked into the skin. This is divided into harmless conditions and those conditions which require evaluation. Harmless conditions are usually viral fevers.
This is due to low platelet count
, blood vessel problem and rarely blood composition problem.
these need to be ruled out. Again in this also there are self limiting conditions, meaning we need not do much intervention
This child needs a medical evaluation