Dear parent,
Thank you for your consult at DoctorSpring.com.
It a a very complex medical situation that we are dealing with. You have elucidated multiple problems that are co-existing in your family. Mitochondrial dysfunction, autism, eosinophilic esophagitis cannot explain the skin symptoms.
The skin problem of recent onset that you have described could be due to eczema itself or something more serious. Does it appear to be mottled or cyanosed? Please send me photographs of the skin problems that you have noted. That ll help us understand the situation better.
Would be glad to answer any follow-ups as well.
Regards
Dr. Saptharishi L G