Which statement is NOT a typical adverse reaction to TENS?

• A. Skin irritation at the electrode interface
• B. Dizziness
• C. Nausea
• D. Taste disturbance

Answer: (D)

Transcutaneous electrical nerve stimulation delivers current through skin electrodes to modulate pain signals. A typical adverse reaction is skin irritation at the electrode interface, from adhesive, sweating, or high impedance, which can manifest as redness or itching and, with improper use, even a mild burn. Dizziness and nausea can occur in some individuals if the stimulation is very strong or poorly tolerated, but these are not common or specific to TENS. Taste disturbance would require effects on the gustatory system, which transcutaneous stimulation does not engage, so it is not something you would expect with standard TENS use. If any adverse signs occur, reassess electrode placement, skin condition, and stimulation intensity.