My 6 yea old son has been diagnosed with pnemonia and put on Amoxicillian 3 times a day for 10 days. Before he was diagnosed, He had very high temps, cough and broke out in rash that looked liked hives . He has been on the medicine for three days now but continues to break out in the rash on his legs, arms, feet , between his fingers, ears and face. Some of the rash develops into hard lumps