WebMD explains sensory processing disorder, a condition in which the brain has trouble receiving information from the senses. People with the condition may be over-sensitive to things in their environment, such as sounds.
Diaper rash is a skin eruption that appears on the skin under a diaper; the rash typically occurs in infants and children younger than 2 years, but also afflicts those who are incontinent or paralyzed.
Children who have surgery experience pain just as adults do, and they usually are able to express their pain in one form or another. Most children older than 18 months can use the word pain, and children younger than 18 months often say they are “hurt.”