My father has got pain in foot and as per report 5th spine is slightly reduced. He is 65.Can u recommend any exercise or medicine?

Conservative care. For most spine conditions, initial conservative treatment such as physical therapy (including strengthening and stretching) and anti-inflammatory medications is indicated. It would also be reasonable to try massage, ice or heat, or over the counter creams such as aspercreme or capsaicin creme. If your symptoms do not improve, see a physician to discuss further treatment options.
Neurotransmitters. There is a group of drugs known as the neurotransmitters which can usually help. These include Gabapentin or Neurontin and Lyrica (pregabalin) or Pregabalin .