my son had the similar problem last year. It was caused by cold virus, and it is not unusuall. It will recover in a couple of days. Check if your son had other cold symptems, if so, it's likely caused by cold virus.
回複:四歲的孩子昨天下午回來叫右腿疼,問過老師在學校裏也沒有摔過,現在走路都疼,約了
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• 回複:回複:四歲的孩子昨天下午回來叫右腿疼,問過老師在學校裏也沒有摔過,現在走路都疼,約了 -rowyourboataaa- ♀ (122 bytes) () 09/13/2012 postreply 16:16:02