What is the general purpose of combining TENS and iontophoresis in pain management?

• A. To cure the underlying disease
• B. To identify tissue boundaries
• C. To help relieve both acute and chronic pain
• D. To reduce edema only

Answer: (C)

The main idea here is that using TENS alongside iontophoresis targets pain through two different, complementary mechanisms. TENS provides neuromodulation right at the nerves, helping to reduce the perception of pain by altering how signals are transmitted to the brain. Iontophoresis delivers medication through the skin using a mild electrical current, which helps reduce inflammation and local sensitization that often contribute to ongoing pain. Together, they offer broader pain relief that can apply to both acute injuries and chronic pain conditions, without aiming to cure the underlying disease itself.

This is why the best choice focuses on relief of pain rather than curing a disease, identifying tissue boundaries, or reducing edema alone. While reducing inflammation from iontophoresis can help with edema linked to inflammation, the primary aim of combining these modalities is to relieve pain through both modulation and local drug delivery.