i'd suggest you get this checked out by a health care provider. it's possible your son has a combination of things going on and a health care professional will need to do a physical examination in order to make sure your son gets the proper treatment. i wanted to note that cracking at the corners of the mouth can be a symptom of a common condition called perleche or angular chelitis. this condition often is related to nutrition and can be fixed with improved nutrition or vitamin supplements. however the symptoms you describe could have any number of causes including canker sores fever blisters or plain dry lips. that's why it's important to get your son checked out by a health care provider. best wishes to you both!
my son has red dots arund mouth chapped and cracked lips at the corners. what could cause this what should i do for him