Tingling: backs of both legs, behind the knee, and top part of leg, including calves and thighs.; Numbness: backs of both legs, behind the knee, and top part of leg, including calves and thighs.; Could not sleep; lower back pain; Pain in both legs; nerve pain; This is a spontaneous report received from a contactable reporter (Consumer). The reporter is the patient.  A 53-year-old female patient received bnt162b2 (BNT162B2), administered in arm left, administration date 19Apr2021 12:20 (Lot number: EW0138) at the age of 53 years as dose 1, single for covid-19 immunisation. The patient had no relevant medical history. The patient's concomitant medications were not reported. The following information was reported: PARAESTHESIA (non-serious) with onset 22Apr2021, outcome "not recovered", described as "Tingling: backs of both legs, behind the knee, and top part of leg, including calves and thighs."; HYPOAESTHESIA (non-serious) with onset 22Apr2021, outcome "not recovered", described as "Numbness: backs of both legs, behind the knee, and top part of leg, including calves and thighs."; INSOMNIA (non-serious) with onset 22Apr2021, outcome "not recovered", described as "Could not sleep"; BACK PAIN (non-serious) with onset 22Apr2021, outcome "unknown", described as "lower back pain"; PAIN IN EXTREMITY (non-serious) with onset 22Apr2021, outcome "unknown", described as "Pain in both legs"; NEURALGIA (non-serious) with onset 22Apr2021, outcome "unknown", described as "nerve pain".  Additional Information: The patient received Pfizer COVID-19 Vaccine because she heard it was the better vaccine of all the choices of vaccines. The patient had the Pfizer COVID vaccine on Monday (19Apr2021). She didn't have any problems for the first couple of days. Yesterday (22Apr2021), the backs of both of her legs, behind the knee, were getting numb and tingly. Later during the night, that event got worse, and if she was sitting down, the numbness got worse. She tried to walk around. Last night, she could not sleep because of the pain. In the afternoon, her lower back and both legs had pain described as nerve pain and an aching type of pain. The patient experienced numbness and tingling: backs of both legs, behind the knee, and top part of leg, including calves and thighs in the afternoon. Her lower leg pain had resolved, but behind her thighs and lower back pain is ongoing. She confirmed that she had her first vaccine. The patient had no history of all previous immunization with the Pfizer vaccine considered as suspect. The patient did not receive additional vaccines on same date of the Pfizer suspect. Adverse events did not require a visit to emergency room or physician office. The patient had no prior vaccinations within 4 weeks and no adverse events following prior vaccinations. The patient had no family medical history relevant to adverse events. No relevant tests were done by the patient. She did not do any lifting that would hurt her back, and cause pain, and that the only thing that happened this week was getting the vaccination. She asked if anybody else was complaining of the same symptoms that she reporter and what should she be doing next for her symptoms.  No follow-up attempts are possible. No further information is expected.