mild headache; soreness around the area that the shot had been administered; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP).  A male patient received bnt162b2 omi xbb.1.5 (BNT162B2 OMI XBB.1.5), as dose 1, single (Batch/Lot number: unknown) for covid-19 immunisation. The patient's relevant medical history and concomitant medications were not reported. The following information was reported: HEADACHE (non-serious), outcome "unknown", described as "mild headache"; VACCINATION SITE PAIN (non-serious), outcome "unknown", described as "soreness around the area that the shot had been administered".  Additional information:  The day of the vaccine appointment was unusual, the pharmacy was overwhelmed and backed up. Folks already there prior to my arrival were complaining that it was taking way too long, and they all were wondering how much longer before they got their shots. I was just glad I had given myself sufficient time before my scheduled appointment to fill-out paperwork. I wasn't sure if the folks that were there prior to my arrival had scheduled appointments or were walk-ins though since there was tension in the air already. But to my surprise the Pharmacist came out with dozens of individual prep patient boxes and began to call out names to administer the shots, and like clock work everyone there got called and were given their shots. Hours passed and I felt fine, just a bit of discomfort in the area where shot had been administered but nothing else. As days went by I did feel tingling in my fingers but only on the side where I had gotten the shot. It went away as I did things that required usage of my hand/fingers which are everyday tasks. But then I began to feel tightness on my left knee and began to notice I could not place pressure on it and gradually began to experience trouble lifting and bending of my left knee which prior to the vaccine I had not encountered any issues with. The pain and discomfort became unbearable that I mentioned it to my husband and daughter and asked if they had experienced any strange effect after their vaccine shots - nothing out of the ordinary, only a mild headache here and there and soreness around the area that the shot had been administered and a slight episode of mood swings experienced by my daughter days after. So I got a muscle rub cream and a tens unit and at first seemed to alleviate the pain and discomfort, but then it began to tighten and worsen the area after application. That's when I decided to go in and talk with my Primary Care Provider and inform him of what I had been going through and what my concerns/issues were. But prior to my scheduled visit with my Primary Care Provider I developed what seemed to me to be either a skin ulcer/cyst/boil underneath my right arm where the vaccine had been administered and I was taken back by this since there wasn't any report that I was able to find that listed that as a side effect. So the day of my Primary Care Provider appointment I mentioned the above and Primary Care Provider prescribed antibiotics to treat skin ulcer/cyst/boil etc. I'm glad to report that my skin ulcer/cyst/boil has healed and started to look b  Follow-up attempts are completed. No further information is expected.