Hi and thanks for the query, Advil is a non steroidal anti inflammatory drug and simple helps in reducing fever and pain, and does not cure the cause of the symptoms. Its imperative that the child gets examined by a physician. Blood tests like a complete blood count, stool examinations and cultures and urine tests could be very useful in making a clear diagnosis and drawing up an appropriate management plan. Right lower abdominal pain compels exclusion of an acute abdomen, especially acute appendicitis. I suggest you consult your family physician or pediatrician for proper examination and management., and urgently too. thanks and best regards, Luchuo, MD.