Peroneal neuropathy is a rare complication after bariatric surgery, but it occurs in 15% of mononeuropathy. The etiology of peroneal neuropathy is multifactorial and is often blamed for these factors due to rapid weight loss and nutritional imbalance. Emine Karaca, 25 years old, female Patient 1 year ago, she had a stomach reduction (obesity surgery) surgery due to her weight of 130 kg. Six months after the operation, it decreased to 60 kg. Meanwhile, numbness in his right foot began to be pain and loss of strength after the operation. In the EMG performed on May 10, 2016, he was diagnosed with Fibulahead entrapment neuropathy-low foot. He was tied to lie in the same position for a long time during the operation. After this diagnosis, 15% prolotherapy was applied around the peroneal nerve of the fibular head on 11.05.2016. Prolotherapy was applied 2 times with 10 days intervals. L4-5 and L5-S1 segmental neural therapy in the lumbar region and neural therapy around the fibular head of the peroneal nerve and along its trace were applied twice a week. After a total of 2 prolotherapy and 6 neuraltherapy applied in 3 weeks, complete clinical recovery was achieved. This complete recovery was confirmed by EMG. Since electrophysiological findings of denervation occur after 2-3 weeks, it is recommended that EMG examination be performed 3 weeks later. Treatment includes relief of complaints (analgesics and gabapentin), physical therapy applications and support immobilizers. In cases that do not respond to treatment, nerve exploration and relaxation is provided with a surgical approach. Prolotherapy and neural therapy, among complementary medicine modalities, can also be used in peroneal nerve neuropathy.