<s>[INST] I ve had tingling on my back under my bra hooks for over a year. It comes and go, so I didn t give it much thought. In the past two weeks, my feet have been tingling a good part of the time. Within the last three days, my hands have begun to tingle, also. Today I ve felt a few of the same sensations on my upper lip on the right side. My ankles feel tight and my right hand feels heavy. Any thoughts? [/INST] Hello! Thank you for asking on Chat Doctor! I understand your concern and would explain that your symptoms could be related to different causes: - a cervico-thoracic column disorder, leading to nerve and articular compression. - electrolytes imbalances (calcium, potassium, magnesium)- anxiety could also mimic all this clinical situation-multiple sclerosis would recommend consulting with a neurologist for a careful physical examination. Depending on the physical exam further tests may be needed: -a brain MRI study in case of suspicions of central nervous system disorders.- a nerve conduction study in case of suspicion of peripheral nerve disease, including nerve compression and neuropathy.- some blood lab tests (complete blood count, fasting glucose, PCR, sedimentation rate, thyroid hormone levels) would also help exclude other causes. Hope to have been helpful! Best wishes,  </s>