Hello, Welcome to Health Care Magic. I read carefully your query and I understand your concern. The cause of constipation of your child probably is heave milk drinker, studies have been shown that children that drinks cow milk have a chronic constipation situation, for these I recommend to replace the cow milk with another type of milk, you should avoid cow milk no stop other type of milk, because a child need milk. Except this you should add water to his meals and give a lot of water, notably when is summer. You can add to his diet pears, plums as fresh or boiled like compote. You can make a blood test of TSH to avoid any doubt for the cause of chronic constipation but I recommend you to make this change on diet that I mentioned before and your son can avoid suffering from constipation. . Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Kind regard, Dr .Marsida Janko