A FEW DAYS AGO MY 10 YEAR OLD SON C/O SUDDEN WEAKNESS IN HIS THIGHS. THE FOLLOWING DAY AND FOR THE PAST FEW DAYS THEY HAVE BEEN INCREDABLY SORE. TONIGHT MY OLDER SON CALLED TO TELL ME HE HAD SUDDEN WEAKNESS IN HIS THIGHS A STOMACH ACHE AND SMALL BLACK SPOTS ON HIS TONGUEALONG WITH A SORE THROAT AND PUFFY EYES. THE ONLY THING IN COMMON IS THE SUDDEN THIGH WEAKNESS, BUT COINCIDENTAL. ANY IDEAS WHAT MAY BE GOING ON