Are there other signs or symptoms present? There are many different conditions that can cause abdominal or stomach pain. Possible causes include: appendicitis, bowel obstruction, cholecystitis or inflammation of the gallbladder, chronic constipation, diverticular disease, excessive gas, food allergy, food poisoning, gastroesophageal reflux, heartburn or indigestion, hernia, kidney stones, pancreatitis, parasitic infections, ulcers, urinary tract infections or viral gastroenteritis.
Sometimes, abdominal pain may also be caused by muscle strain or from any organ in the chest, like the lungs or the heart. I would recommend that you have this evaluated by your doctor for proper diagnosis and management. A complete medical history and physical examination are important to reach a diagnosis. A description of the pain, the quality, severity, exact location, timing or onset are important factors that you should tell your doctor. As for the browning around the eyes, this could be a separate hamless condition.
Take care and keep us posted.