How long is to long to have a on and off slight headache 33 otherwise healthy has had one on and off for 5 days haven't taken any med not bad hurt?

May help to take : Pain med. Some times breaking the cycle of pain helps in avoiding the muscle tension that often goes with a headache. Take tylenol (acetaminophen) (no more than 4 gm/day) to see if that helps. If you develop any other symptoms, it would be prudent to see your doctor. See this site for more info. http://www.nlm.nih.gov/medlineplus/ency/article/003024.htm.