A bacterial infection of the vagina can feel a lot like a yeast infection if the vulval area is itchy or painful. Unlike a yeast infection, the discharge can be dark yellow, green, or brown and it won't smell like bread, it can smell like fish or something rotting.
GERD can and does cause upper back burning sensations that can migrate down one side or both sides of the body to the legs. Sometimes pain or symptoms may occur in the chest or sternum area but not always. GERD can also cause a recurring cough and fatigue.
It's possible to get an upper back muscle sprain or a strain through: 1  poor posture: Sitting with a rounded back, shoulders hunched forward, can put too much stress on the back muscles. Poor posture is one of the leading causes of upper back pain because so many office workers spend their work days at the computer.