Left leg started aching and it was aching down one leg and in his back; Left leg started aching and it was aching down one leg and in his back; disc issues/Back disc issues/disc in his back has gotten worse; disc issues/Back disc issues/disc in his back has gotten worse; References back pain\he suffered some back pain and has experienced the back pain until now; he has nerve pain in his leg; This is a spontaneous report received from a non-contactable reporter (Consumer) from medical information team for a Pfizer sponsored program. The reporter is the patient. A male patient received bnt162b2 (BNT162B2), administration date 02Jun2021 (Batch/Lot number: unknown) as dose 1, single for covid-19 immunisation. Relevant medical history included: "Psoriasis" (unspecified if ongoing), notes: He has psoriasis/autoimmune disease; "Asthma" (unspecified if ongoing), notes: he has asthma; "Lung issues" (unspecified if ongoing), notes: he has lung issues; "back issues" (unspecified if ongoing), notes: he has back issues already for years; "disc issues of the lumbar back and in his back" (unspecified if ongoing), notes: he has back issues already for years and has disc issues of the lumbar back and in his back; "Heart diseases" (unspecified if ongoing), notes: he has some implications heart diseases; "pinched nerve", start date: 2021 (unspecified if ongoing), notes: when he strained his back in late May or early June. The patient's concomitant medications were not reported. The following information was reported: PAIN IN EXTREMITY (hospitalization), ARTHRALGIA (hospitalization) all with onset Jun2021, outcome "recovered" (2021) and all described as "Left leg started aching and it was aching down one leg and in his back"; INTERVERTEBRAL DISC DISORDER (non-serious), CONDITION AGGRAVATED (non-serious) all with onset 2021, outcome "recovered" (2021) and all described as "disc issues/Back disc issues/disc in his back has gotten worse"; BACK PAIN (non-serious) with onset 2021, outcome "not recovered", described as "References back pain\he suffered some back pain and has experienced the back pain until now"; NEURALGIA (non-serious) with onset 2021, outcome "unknown", described as "he has nerve pain in his leg". The patient was hospitalized for pain in extremity, arthralgia (start date: 2021, discharge date: 2021). The patient underwent the following laboratory tests and procedures: sars-cov-2 test: (16Nov2021) negative, notes: his last test was done at the hospital/that test was negative. Additional information: At the time after he got his first shot in the first week of Jun2021, he had disc issues/back disc issues. He suffered some back pain and has experienced the back pain until now. His left leg started aching from knee down the leg (Jun2021). Primary care physician (PCP) stated that no it was not the vaccine. The disc in his back has gotten worse. He stated that he had back issues already for years and has disc issues of the lumbar back and in his back and the doctor said it was a pinched nerve when he strained his back in late May or early June (2021) and it was strained at the time he got the 1st dose of the Pfizer Covid vaccine and he got the first dose of the vaccine about 4 days after, his lower back was aching and it was aching down one leg and in his back. His doctor said it was silica nerve due to straining his back and the Pfizer Covid vaccine did not cause that. He called the hospital, and they said the vaccine could not cause the back issue and if there was any muscle or joint pain it would be mild and would not last longer than two days and he have nerve pain in his leg. He added that he takes physical therapy, and it is chronic, and he is wondering if that was a side effect of the vaccine. All his doctors in the hospital said the Pfizer Covid vaccine would not cause leg pain from the back and he has this because he injured his back. his question is should he get tested first before the booster dose and he has no symptoms, and his last test was done at the hospital on 16Nov2021 when he went into the hospital and that test was negative. The patient reported that he was due today (23Dec2021) for 6-month booster and inquired if he needs to be tested. The patient had references back pain which indicated by HCP as not related. He strained his back. His HCP recommended to get booster dose. Second dose was on 23Jun2021.   No follow-up attempts are possible; information about lot/batch number cannot be obtained. No further information is expected.