Suggest Treatment For Headache And Sickness To Stomach

my 46 year old daughter has had headaches and sickness to her stomache most of her life. Food doesn't taste good, has no desire to eat but has too. Can stress in her life for all of her life be the cause? Her weight...130, height 5',6'', and has had panick attacks since the age of 16. Other than that she is pretty healthy. Stress has run her life, most of her life.