Red bumps in her left armpit that are smaller than a pea size that seem to be itchy; Red bumps in her left armpit that are smaller than a pea size that seem to be itchy; Ingrown hair; This is a spontaneous report from a contactable Nurse. This 44-year-old female Nurse (patient) reported for herself that she received the first dose of BNT162B2 (COMIRNATY, Lot No. 30145BA) at left arm at single dose for COVID-19 immunization on 08Oct2021. Relevant history included she had a breakout with latex like a rash years ago. Relevant concomitant drug was unknown.The patient experienced Red bumps in her left armpit that are smaller than a pea size that seem to be itchy in Oct2021 which was considered as serious (medically important) with not resolved outcome. The patient also had ingrown hair in Oct2021 with not resolved outcome. The patient denied a medical history of ingrown hair. The patient was experiencing after the first dose of the Pfizer Covid-19 vaccine that she received on 08Oct2021. She received the Pfizer Covid-19 vaccine in her left arm and a week or so later after receiving it, started having complaints of red bumps in her left armpit that were smaller than a pea size that seem to be itchy.  The red bumps was reported as worsened.  She was unsure if the above complaints were related to the Pfizer Covid-19 vaccine and was unsure if it was an ingrown hair or not.  She is due to receive the second dose of the Pfizer Covid-19 vaccine today 29Oct2021.  She asked if red bumps are a side effect of the Pfizer Covid-19 vaccine.  The patient stated that what's going on was that it started a week and a half ago. She got her first dose on 08Oct2021. It was about a week later that all the sudden she had lumps showing up, she thought to herself what's going on, is it ingrown hairs? Maybe, but she had never had that issue before. She was taking shower and she knows that she had no soap change either. The only different thing she did was get the vaccine. The bumps are on the Left side, the same side where she got the vaccine. The bumps are in the armpit. She was squeezing them but they just proceeded. She is afraid to put deodorant on it. It started with one bump but she now has 5 or six in the armpit now. Regarding the red bumps: She can see them in the mirror, she doesn't think its that big of a deal. It started a week later in Mid Oct2021. She described the Red bumps as being smaller than pea sized, but there is 1 that is larger than pea sized, the larger one was the first infian bump, after it came the bunch of littles ones. She's never had an ingrown hair. She tried to put cold packs to see if it would resolve but its not going away. She can walk around, it's not anything adverse, it gets itchy, and is more tender, when she will go to bed that when she feels it bugging her, she can feel it throbbing so she pinches and squeezes it to get it to come out. They're not going away, it's hard to not to pick them. Her aunt was squeezing it when she had her come over, and it  was just clear stuff coming out. It was worse because initially she only had 1 to begin with, now it's multiple small ones. It's not terribly worse, but nothing was improving. She had just blown it off. She had no underlying conditions.  Seriousness Criteria: It's not to the point she needs to run to a doctor, but it's bugging her. She trying to brain storm was causing it. Then is finally dawns on her, the only different thing she had was the vaccine.  Caller clarified that she is Due today for the second dose but it is not scheduled today. Today just marks the 21 day mark. She walked into the Walmart pharmacy and they told her she doesn't need to schedule it, she can walk back in, but her question is if she do or don't.  Causality: It's Unknown, but she knows the vaccine is the only different thing she had. Medical Conditions: None except that she could possibly be going into Menopause. Allergies: She at first says Sulfa, but then states no she's thinking of her son. She is not allergic to Sulfa's, that's her son. There is 1 allergy she is thinking of that she is aware of, she had a breakout with latex like a rash, years ago.; Sender's Comments: Considering a temporal relationship, a possible contributory role of suspect product BNT162B2 to the reported events Rash erythematous and Rash pruritic cannot be completely excluded.  The impact of this report on the benefit/risk profile of the Pfizer product is evaluated as part of Pfizer procedures for safety evaluation, including the review and analysis of aggregate data for adverse events. Any safety concern identified as part of this review, as well as any appropriate action in response, will be promptly notified to regulatory authorities, Ethics Committees, and Investigators, as appropriate