had some trouble sleeping last night; achiness in both legs; arm soreness/he definitely had a lot more arm achiness and arm was sensitive to touch; This is a spontaneous report received from a non-contactable reporter(s) (Pharmacist). The reporter is the patient.  A 27-year-old male patient received BNT162b2, BNT162b2 omi ba.4-5 (BNT162B2, BNT162B2 OMI BA.4-5), on 03Dec2022 as dose 4 (booster), single (Batch/Lot number: unknown) at the age of 27 years, in left arm for covid-19 immunisation. The patient's relevant medical history included: "Lactose intolerance" (unspecified if ongoing), notes: Lactose intolerance, symptoms started in his early 20's but has no official diagnosis; "basic allergies has had for 4-5 years" (unspecified if ongoing), notes: Comments: basic allergies has had for 4-5 years. Concomitant medication(s) included: PROBIOTIC 10 [BIFIDOBACTERIUM BIFIDUM;BIFIDOBACTERIUM LACTIS;LACTOBACILLUS ACIDOPHILUS;LACTOBACILLUS BREVIS;LACTOBACILLUS BULGARICUS;LACTOBACILLUS CASEI;LACTOBACILLUS PARACASEI;LACTOBACILLUS PLANTARUM;LACTOBACILLUS RHAMNOSUS;LACTOBACILLUS SALIVARIUS]. Vaccination history included: Bnt162b2 (DOSE 1, SINGLE, He had the primary series, both shots last year he thinks Mar2021), administration date: Mar2021, for Covid-19 immunization; Bnt162b2 (DOSE 2, SINGLE, He had the primary series, both shots last year he thinks Mar2021), administration date: Mar2021, for Covid-19 immunization; Bnt162b2 (DOSE 3 (BOOSTER), SINGLE, then he got the 1st booter he thinks Nov2021), administration date: Nov2021, for Covid-19 immunization. The following information was reported: PAIN IN EXTREMITY (non-serious) with onset 03Dec2022, outcome "recovered" (04Dec2022), described as "achiness in both legs"; PAIN IN EXTREMITY (non-serious) with onset 03Dec2022, outcome "recovering", described as "arm soreness/he definitely had a lot more arm achiness and arm was sensitive to touch"; INSOMNIA (non-serious) with onset 04Dec2022, outcome "unknown", described as "had some trouble sleeping last night". Therapeutic measures were not taken as a result of pain in extremity, insomnia, pain in extremity.  Additional information: Received the vaccine yesterday in the left arm at a local pharmacy (pharmacy name withheld) in the afternoon time. Clarifies that he received the vaccine 2 days ago on Saturday, 03Dec2022. Later on, that evening he had a little arm soreness. Saturday night when in bed trying to sleep, he definitely had a lot more arm achiness and arm was sensitive to touch. Yesterday symptoms continued. Today it has lessened, the achiness is reduced, and arm is still sensitive to touch. He is able to lift his arm more than 90 degrees. Saturday and most of yesterday he couldn't lift more than 90 degrees. States he has not taken anything for it. He had the primary series, both shots last year he thinks Mar2021, then he got the 1st booter he thinks Nov2021. Just with his age and was knowledgeable when the next booster came out in spring, so this is his 4th shot total. Concomitant medication takes a probiotic but has taken longer than 2 weeks. He had the primary series, both shots last year he thinks Mar2021, then he got the 1st booter he thinks Nov2021. Vaccination Facility Type pharmacy or Drug Store. No vaccine administered at military facility. Later on, that evening he had a little arm soreness. Wants to add he also had some kind of like achiness in both legs Saturday evening started early evening and while in bed. Yesterday it was gone totally when woke up. He thinks somewhat, would say probably had a roll in it. He was out driving and walking around but not a fair amount, so it played a part.  No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.