losing my hair; every single joint in her body was in pain; She felt like she had COVID and had joint pain everywhere, it was horrible. She states it was gone in 24 hours; lichen planopilaris; Pfizer booster; This is a spontaneous report received from contactable reporter(s) (Consumer or other non HCP) from medical information team for a Pfizer sponsored program (005570). The reporter is the patient.  A 77 year-old female patient received bnt162b2 (BNT162B2), administered in arm right, administration date 06Oct2021 (Lot number: FF8841, Expiration Date: 31Dec2021) at the age of 77 years as dose 3 (booster), single for covid-19 immunisation. The patient's relevant medical history was not reported. There were no concomitant medications. Vaccination history included: Bnt162b2 (Vaccine Name: First dose , Lot Number / Expiry Date: EN5318/ 31May2021, Route, Anatomical Location: Right arm , No. of Previous Doses: This was dose 1), administration date: 01Feb2021, for Covid-19 immunization, reaction(s): "Arm Soreness"; Bnt162b2 (Vaccine Name: Second dose , Lot Number / Expiry Date: EN6200/ 30Jun2021, Route, Anatomical Location: Right arm , No. of Previous Doses: This was dose 2), administration date: 22Feb2021, for COVID-19 immunization, reaction(s): "Sore arm"; Flu shot (She had the flu shot a least a month earlier than the booster dose, like in Sep2021), administration date: Sep2021.  The following information was reported: IMMUNISATION (non-serious) with onset 06Oct2021, outcome "unknown", described as "Pfizer booster"; ALOPECIA (non-serious), outcome "not recovered", described as "losing my hair"; ARTHRALGIA (non-serious), outcome "recovered", described as "every single joint in her body was in pain"; SUSPECTED COVID-19 (non-serious), outcome "unknown", described as "She felt like she had COVID and had joint pain everywhere, it was horrible. She states it was gone in 24 hours"; LICHEN PLANOPILARIS (non-serious), outcome "unknown", described as "lichen planopilaris". The event "losing my hair" was evaluated at the physician office visit. Relevant laboratory tests and procedures are available in the appropriate section. Therapeutic measures were taken as a result of alopecia, arthralgia.  Additional Information: After her booster dose she had a terrible reaction, every single joint in her body was in pain. After that, she started losing hair. States that her dermatologist said that she was receiving more patients with this disease (hair loss). She was fine with the first two vaccination shots. She explains 30 hours after her booster dose, she had a terrible reaction. Her doctor said that it was a reaction to the booster. However very slowly afterwards, she started losing her hair. She felt like she had COVID and had joint pain everywhere, it was horrible. She states it was gone in 24 hours and lichen planopilaris. The joint pain occurred 30 hours after receiving her booster dose. She recovered from the joint pain within 24 hours. The hair loss started occurring about a month after the booster dose and has accelerated. She went and saw a dermatologist and it's an actual hair disease. She explains she has had to have scalp injections, it's a hair disease. She later clarifies the name of the hair disease as lichen planopilaris. The terrible reaction with the joint pain was gone in 24 hours. She talked to a nurse who said it was a reaction, so she didn't bother going to the emergency room. She took Tylenol and rode it all out and it was gone in 24 hours. The time of vaccination was reported as between 11:00 to 11:30. There were no additional vaccines administered on same date with the Pfizer vaccine considered as suspect. The patient did not receive any other vaccinations within four weeks prior to the first administration date of the suspect vaccine. The patient did not have any adverse events following prior vaccinations.  No follow-up attempts are possible. No further information is expected.