Symptoms of a gallbladder attack may include a sudden sharp pain in the upper right quadrant of the abdomen or pain below the breastbone. Some patients report pain in the right shoulder or between the shoulder blades as well, according to Mayo Clinic.
Serious, potentially life-threatening conditions may also occur with an inflamed or perforated gallbladder. Symptoms include fever and chills, nausea, vomiting, and intense unbearable pain in the abdominal area, according to the University of Maryland Medical Center. It is estimated that approximately 90 percent of gallstones cause no symptoms, and the chance of symptom occurrence decreases over time.