Eating spicy food raises your metabolism, thus helping weight loss. Eating spicy food does not cause stomach ulcers. If it did, evey Indian, Thai, Mexican, Malaysian and evey other spice loving culture would suffer from ulcers. If you were not brought up eating spicy food or you have a delicate GI tract, then it will bother you.
Besides helping you to lose weight, eating spicy food can help your circulation,helps your heart health, aids in digestion, helps fighting cancer, aid in breathing and helps your mood.