Pain is a complex and subjective symptom that involves quantitative and qualitative factors that directly interfere with public health and incurs an economic cost for its control.39 Pharmacological treatment is currently the most used method for controlling pain; however, it produces many side effects and is highly expensive.43 In this context, nonpharmacological treatments, such as transcutaneous electrical nerve stimulation (TENS), have been increasingly used for the treatment of various types of pain, including cancer pain.
from The Journal of Pain https://ift.tt/34sisaC
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