My son's is having problem of legs paining, what is the reason behind it?

Question

Accepted Answer

It’s called growth pain which usually is common with kids and also a lot of times due to deficiency of vitamin D3 and calcium also you can see this kind of an issue you should start with necessary supplements after getting it examined with your doctor

Answer

Primarily due to vitamin D and calcium deficiency. so make sure you consult your paediatrician and give D3 drops and other necessary medicines.

Answer

there are multiple causes of limb pain during this age because it can be normal due to growth pain. 
it can also occur due to nutritional deficiency mainly vitamin d, vitamin b12d iron and calcium deficiency.
if there is excessive playful activity by the child during the daytime it is but obvious that during the night time there might be limb pain.
if the limbs are paining without any activity then yes medical examination and treatment will be required