An irritation or injury to any component of the central or peripheral nervous system can result in many signs and symptoms. One very common complaint by patient's is numbness, which is often benign, but can be a manifestation of a more serious condition. Therefore, it is always recommended that any such complaint be evaluated by a physician.
An abnormal sensation, or paresthesias, or a painful or uncomfortable sensation, dysesthesias, is often a reflection of an irritated spinal nerve root or peripheral nerve. Less likely, this would be the sole symptom of injury in the brain or spinal cord. If any component of this neurologic pathway is entrapped or compressed, typically it will present with complaints of numbness, tingling, or burning. This may or may not be associated with complaints of weakness, heaviness, fatigue, or muscle cramping although certainly the entirety of one's complaints should be evaluated and taking into consideration.
A proper and thorough history and physical examination will allow your physician to understanding the extent of your complaints and formulate a diagnostic and treatment plan in order to better evaluate your complaints and treat them appropriately. This may or may not include appropriate imaging studies as well as electrodiagnostic examinations and use of medication and physical modalities.