Dear Ms. Hicks,
Thank you for your question about your son.
Since your son is having
recurrentRecurrent cystitis vomiting - I would encourage you to see a Pediatric Gastroenterologist. Could there be an anatomical explanation which could be evaluated by radiographic studies? Or could this represent reguritation of stomach contents - what is referred to
gastroesophagealGastroesophageal reflux disease
Gastroesophageal reflux in infants refluxGastroesophageal reflux disease
Gastroesophageal reflux in infants
Hiatal hernia repair
Reflux nephropathy
Vesicoureteral reflux ? Or might your son be very sensitive to certain foods in his diet - dairy, gluten come to mind. Again, a gastroenterologist could help sort some of this out - and, perhaps - depending upon his/her findings - even recommend treatment.
You mentioned that your son is underweight. Certainly his vomiting might be costing him some growth - but not necessarily. More importantly - is he gaining appropriately and maintaining a
normalNormal saline flush growth curve?
With reference to his dry, course skin - is this a separate issue or related to his vomiting? Again, perhaps a specialist or at least someone fresh could help reevaluate.
Sometimes - the answers are slow coming. But I would persist in asking.
Finally - you mentioned that your son has had several tests done. I assume that means that his urine has been tested - that his body chemistries (electrolytes) have been evaluated - when well and when ill. Also - that his stools have been tested for any routine bacterial or parasitic infection. The likelihood that the latter is the source of his vomiting is low - but worth testing.
In the end - I would pursue seeing a specialist.
Good luck - Dr.EV