Hello, As I read in history about your age and acute sciatica I feel this is totally degenerative changes occurred over a period of time. You headache the way you mentioned is also indicative of Same degenerative changes I would recommend you to take an MRI of lumbar and cervical spine as it will provide more insight to your complaints. For sciatica there is a set of exercises available but keeping into consideration of your blood pressure we need to go slow and steady so recovery follows. Exercise include - core stability, spinal extensor muscle strengthening, static Quadriceps, static hamstring and straight leg raise. This exercise has been found effective in research for people having acute sciatica. For your headache, I will recommend to use hot water fermentation over the neck region, then using a neck collar for a week and check out if the headache comes down. If so then we can conclude this headache to be cervicogenic headache. Some exercises to strengthen the muscles of the neck, like the static Neck exercises, should be of help Do abundant of deep breathing exercises on a regular basis to have a good pulmonary system so that the fatigue is delayed while performing the exercises. In my clinical practice of over 12 years most cases have been improved and able to have a pain free life. I wish you good luck and pray for your good health. Hope I have answered your query. Let me know if I can assist you further. Regards, Jay Indravadan Patel, Physical Therapist or Physiotherapist