Introduction. High-voltage electrical injuries remain a difficult challenge for physicians. The survivors often have complicated wounds over the trunk or extremities, and some of them may develop hypoxic encephalopathy. The emergence of spasticity following hypoxic encephalopathy may further interfere with the healing of wounds. Case Report. The authors report the case of a 17-year-old male with strong spasticity of finger flexors graded 4 by the Modified Ashworth Scale (0–5) after electric shock. He also had a nonhealing wound on the flexor side of the left index finger after 6 weeks of standard wound care. The wound measured 0.3 cm × 0.3 cm × 0.2 cm in size. The authors hypothesized that wound healing was negatively affected by spasticity and expected the wound might heal gradually after reducing the strong spasticity of the index finger. The authors employed electrical stimulator for guidance and injected high-dose (50 units/muscle) botulinum toxin type A into the flexor digitorum superficialis and the flexor digitorum profundus of his left index finger. At 7 days following administration, focal spasticity of these muscles in the left index finger decreased from 4 to 1 on the Modified Ashworth Scale. At 21 days post administration, the wound healed completely. Conclusions. For patients with hypoxic encephalopathy due to high-voltage electrical injury, botulinum toxin type A injection may be an option of therapeutic approach for both reduction of spasticity and facilitation of wound healing.