Throbbing sensation in upper right back after meals. what could be wrong?

Gallbladder?: Traditionally the symptoms are felt in the right upper quadrant, under the ribs or at the bottom of your sternum . And traditionally radiate to the back. There may be nausea, bloating or even vomiting. The pain can feel like a sharp gas pain, like you need to belch or a sore muscle in your rt back. Your primary md will be able to examine you, get a good history and help you find out. Get well.