I frequently feel pain in my chest and abdomen what could be the reason?

Needs to be checked. Pain in chest and abdomen needs to be checked by your doctor to find the cause so consult your doctor.
More info needed. There's not enough information to make a diagnosis. Is the chest pain occurring with exertion or deep breathing? Is there a cough or tender areas? Is the abdominal pain brought on by eatings? Is it upper or lower? Any vomiting or bowel problems?