For millions of kids, bed-wetting is a normal part of growing up. According to The Mayo Clinic, bed-wetting affects about one of every four children at age 5, and boys make up two-thirds of this group. While bed-wetting is frustrating, it isn't usually a cause for concern until your child is around age 6. Reasons why kids wet the bed aren't fully understood, but are thought to include underdeveloped bladders, constipation (when hard stool puts extra pressure on the bladder), heavy sleep, and infection. It's not caused by physical or emotional problems, though emotional distress may cause bed-wetting in a child who has been dry for some time. Almost all children grow out of bed-wetting, but there are some steps you can take to help move the process along. Try the following seven tactics to beat your child's bed-wetting ASAP.