Neuralgia

With unbelievable chakra control comes unlimited ability to inflict pain, or promote healing. Coupling this with careful aim and immense knowledge on the anatomy of a human, very skilled Medical-Nin can cause a nerve to be very sensitive with a simple touch. Pinpointing their chakra to their fingertips [Normally their pointer finger and middle finger], they can then lightly press on to a nerve anywhere on the body to make it hyperactive. This hyperactivity can cause the opponent, or patient, to experience sense, such as pain or pleasure, much stronger than other individuals in the area struck.

Another side to this could be simply jabbing the nerve with chakra enhanced fingers, and then pushing the chakra into the nerve to cause extreme pain. Much like the [[Chakra Scalpel], however, hitting the mark correctly will be difficult even for the most experienced Medical-Nin. But, because nerves are so vastly spread about the human body, striking the exact one you want may not be possible, yet hitting at least one other will.

This extreme pain or sensitivity can become a serious problem for the adversary. The pain can be absolutely unbearable, and combating it is incredibly hard to do, or simply ignoring it is like trying to "forget" that someone is jamming a Kunai in their arm. This attack can make for crippling pain, causing the victim to drop to the ground and completely lose focus on their opponent due to the pain being so excruciating.

This agony could continue unless seeing another Medical-Nin with experience treating this. Of course, special medicine is required to treat this, though the symptoms may be permanent due to nerve damage.

Special Note
Kuro/Medic is the sole creator and user of this technique. Any Medical-Nin wishing to learn it must go through her first.