If you didn t really feel dazed or disoriented at the time of the SMACK and there was no nausea/vomiting or extreme lethargy or fatigue then, the worst you probably did is SMACK your head REALLY HARD. In other words, it is unlikely that you suffered a concussion. So there s no need to head the ER for sure. If, however, you are developing what could be interpreted as headaches then, you definitely are suffering from some post-traumatic headaches which could take several days, several weeks, or several months to resolve. You might try just some light amount of Tylenol or Motrin a couple of times daily for a few days (no more than that) to see if the pain calms down. You can also use a warm compress over the area which usually soothes most people. If it s more complicated than that or the headaches develop into anything more funky or weird or strange then, I would seek out a neurologist or headache specialist and see what the best course of action might be. If you ve found this information helpful could you please provide a STAR RATING of the response. I hope you get better soon....those kinds of hits are annoying.....are more for the fact, that you realize that you were the yahoo that did it to yourself, right? HAHA! BTW, if you have any specific questions you d like to ever funnel my way why not check out my own page here on this network and look me up either by name, DARIUSH SAGHAFI, MD.....or use this link to get to my home page and then, write me a question using the DIRECT QUERY feature: http://doctor.healthcaremagic.com/doctors/dr-dariush-saghafi/68474 Cheers!