Can a hiatal hernia cause mid to upper back pain?

No: Most people usually don't have symptoms from hiatal hernias. When symptoms are present they are usually those of heartburn or reflux.

Yes: Typically only if it is large. Usually need an upper GI study or endoscopy to check it out.

Hernia: The discomfort you get from a hiatal hernia is usually pain in your upper abdomen or chest. If fact, we sometimes think someone is having pain from their heart when in fact it is heartburn from a hiatal hernia.