Hi, the 2 and a half year old boy who I care for has developed a rash over the last two days. Rash began to appear first on his knees, spread to the palms of hands and soles of feet, and now his palms and soles are completely covered. His legs are now covered in rash also and he has some patches on his elbows. It is itchy and appears to be sore to touch. However there is no appearance of rash elsewhere on his body. He is in good form with no malaise, no pyrexia. Child is otherwise healthy. The rash blanches when pressed and is red and blotchy . It began as separate spots of rash but now the spots have joined to form patches. Any ideas? thank you!