 [ Symptoms ] what is acid reflux disease [ Disease ] i do not know anything about your mother to even guess as to why her shingles case is so bad but basically an individuals response to any disease is unpredictable post zoster herpetic pain the name for what she has can be terrible and my heart goes out to her there are topical pain medications oral pain medications and even anti viral medications that can be used so she will need to discuss those options with her doctor    the person who knows her case and medical history