Hello and welcome to HCM
You have mentioned that your 2 year old has yellowish discoloration on the body.
I advice you to get blood examination done especially hemoglobin
. The yellowish discoloration could be due to jaundice.
And you have mentioned that your 5 year old child is having headache, stomach ache and tiredness
These symptoms could be because of anemia i.e. decrease in hemoglobin.
Along with blood examination, you need to get stool examination done for ova and cysts.
Ova and cyst are present in cases with parasitic infection
of gatro-intestinal tract.
Thanks and take care
Dr Shailja P Wahal