It is important that you understand, as with all health care approaches, results are not guaranteed, and there is no promise to cure. As with all types of health care interventions, there are some risks to care, including, but not limited to: muscle spasms, aggravating and/or temporary increase in symptoms, lack of improvement of symptoms, burns and/or scarring from electrical stimulation and from hot or cold therapies, including but not limited to hot packs and ice, fractures (broken bones),disc injuries, strokes, dislocations, strains, and sprains. With respect to strokes, there is a rare but serious condition known as an "arterial dissection" that typically is caused by a tear in the inner layer of the artery that may cause the development of a thrombus (clot) with the potential to lead to a stroke. The best available scientific evidence supports the understanding that chiropractic adjustment does not cause a dissection in a normal, healthy artery. Disease processes, genetic disorders, medications, and vessel abnormalities may cause an artery to be more susceptible to dissection. Strokes caused by arterial dissections have been associated with over 72 everyday activities such as sneezing, driving, and playing tennis.