Your son is experiencing secondary enuresis which occurs when a child has had proper control over their bladder during the night for a period of six months or more then begins to wet again. Secondary enuresis often catches children and families by surprise and can be particularly distressing for all involved. Secondary bedwetting appears to have two main causes: physical and psychological. While physical causes of secondary bedwetting are rare, any child who experiences a return to daytime or nighttime wetting should consult a medical professional to rule out the possibility of an underlying medical cause. The majority of secondary bedwetting results from emotional problems. All teenagers react differently to stress. Signs of stress include physical symptoms such as ongoing headaches and stomach aches, vomiting as well as nighttime or daytime wetting. Common causes of stress among teenagers include parental divorce or conflict, being the victim of school bullying or other peer-related issues, school-tests or exams or the loss of someone close so. It is important to rule out the physical causes first before you consider stress-related factors. He will need lots of love and support during this time, as well as reassurance that none of this is his fault.