Hard to Say: It is hard to say much about the rash without having more history. Perhaps if you could upload some photos this might be helpful. If your son is overweight, there is a velvety dark thick rash which can go along with prediabetic state called " acanthosis nigricans" to look our for. Best of Luck!
Answered 12/27/2016
3.8k views
?heat: It could be heat.Apply corn starch and calamine lotion.Make sure he is not wearing any metal jewellery--could also be a contact dermatitis
Answered 9/13/2014
3.7k views
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