Dehydration in infants manifests through symptoms such as diapers that are less wet, tight or dry skin, excessive sleepiness, dry mouth, increased thirst and sunken eyes, according to Parents Magazine. Babies who urinate less frequently and produce less tears may also be dehydrated. It is easy for babies to become dehydrated due to their small size, especially during periods when they experience diarrhea or other forms of illness that causes fluid loss.
Parents Magazine recommends that parents consult with a pediatrician to determine the proper course of treatment for an infant that is suffering with dehydration. If not addressed soon enough, fluid loss can become a serious threat to a baby's health. A doctor may prescribe a diet that includes special liquids to ensure the child's fluid loss does not outpace its intake. These liquids usually include an ample amount of electrolytes to maintain the body's mineral balance.
Doctors may advise breastfeeding mothers to keep infants off milk until the illness has passed, according to Parents Magazine. In extreme cases, it may be necessary to admit a baby to a hospital and administer fluids intravenously. Children who are able to eat again are often prescribed a diet of bananas, rice, applesauce and toast to help with the transition to a normal diet.