My son aged 6.5 yrs, weight 20kg, height 45, having lactic allergy with cow milk and yellow part of egg as and when he take those, he started stomach pain arround his navel, for sometime but not everytime, he was perfect in health upto 3 years but now he getting thin day by day, worm problem is continuing, giving almandazolam every 5/6 months after taking that pain symptom reduce but again relaps quickly, stool is like decentry type mostly sometime hard, and having little ictchy screen. Energylevel is ok sleep is not good for last two thee days like restless. Please advice how to go for perfect line of treatment. May I first proceed for stool test?