sir, My son is 2 years 5 months old, he had fallen down from Bed in one month before and head CT Scan had been done. Yesterday, he fell off over the chair and his forehead got injured and swollen, there's no other symptoms and he is playing well and swelling also reduced. Doctor has advised again head CT Scan. My questions are 1) What are side effects after getting two times head CT scan within a months for 2 years 5 months? 2) whether CT scan should be done or not?