Hi, my eleven year old son get quite bad stomach cramps when its cold This has been for the last 4 years. He's been for x-rays, ultrasounds and blood tests. Even though all the test showed everything was fine, the doctor said he had heavy fecal loading. He was given Movicol for that. Unfortunately, that did not help as he is still experiencing the same symptoms. he also complains of being nauseous all the time and vomiting sometimes. What else can it be?