I am a 72 year old active male and two days ago I was performing volunteer work installing a sign. Bending over in the warm sun clearing the post hole I became aware of becoming light headed. I stood and found my eyes were dim and I sat for some time to recover. I noticed a pain in the back of my neck. I eventually did recover and had my blood pressure checked later that day. 141/83, pulse 105 and 10 mins later 118/67, pulse 102.