Inflammation is at the root of almost every chronic disease.  Often, it goes unnoticed until the body loses enough function that it generates symptoms.  Biomedical diseases like fibromyalgia, autoimmune disease, skin disorders, allergies and headaches are the result of inflammation.  Any disease with a prefix of -itis refers to this inflammation process like arthritis.  Improve circulation and inflammation will improve.  Acupuncture is great at improving circulation.