Are the rashes itchy? Usually rashes that appear due to any allergy are itchy.
Does he have any loose stools?
Did it happen the very 1st time when you introduced wheat cerelac?
If rash is associated with fever
, it may be viral too.
can happen in babies.
You may temporarily stop the wheat one and give rice based food. If rashes are itchy and disturbing to the baby, you may give him antihistamines after seeing a pediatrician
And HOME MADE food is best for your baby. You can start with mashed vegetables, fruits, porridges made of rice, dal, soups, juices etc. Slowly you may add and see wheat based items like biscuits. If he rashes again, its sure that he has wheat allergy.
When ever you introduce new food to babies, give only one new food at a time. If you give 2 or 3 new ones at the same time and if he shows allergy, it will be difficult to find out the cause.
Hope you find my answer useful