 [ Symptoms ] what causes costochondritis is there anything that aggravates it like exercise or diet or is it possibly viral [ Disease ] unfortunately humans cannot absorb water through the skin so it is back to the shaved ice again sucking on popsicles or just taking tiny sips through a juice box straw hopefully his doctor gave him something for pain a little tylenol with codeine eliier will help him a great deal but you will need to get someone to call in a prescription for him if his throat hurts less he will be more likely to drink signs of dehydration include a lack of tears a dry mouth and a reduction in his urine output