This is a spontaneous report from a contactable consumer (patient). A 79-year-old female patient received first dose of bnt162b2 (PFIZER-BIONTECH COVID-19 mRNA VACCINE; Solution for injection; Lot number: unknown) via unspecified route of administration in arm left on 06Mar2021at 11:00 (at the age of 79-year-old) as single dose for COVID-19 immunization. Medical history of the patient included high blood pressure, sinus issues. Family Medical History included that her daughter has had reaction to medications, she had flu vaccine and she ended up in the emergency department, she had trouble breathing. Concomitant medications included atenolol started a long time ago taken for high blood pressure. Patient previously used clindamycin as in her age she occasionally breaks. Patient previously received flu vaccine in 2009 for immunization and had a reaction. She had the Flu vaccine for many years and the one she had trouble with was a vaccine without preservatives. On 06Mar2021, seven hours after receiving first dose of vaccination, in the evening patient noticed that her mouth started to burn, accidentally pinched her arm and the pain was more than expected and it left a bruise. On 12Mar2021, patient experienced sinus issues. On 20Mar2021, patient experienced that her legs were heavy and felt like they were weighted, which made it difficult for her to walk. On 22Mar2021, patient experienced burning pain on her lower lips, specifically in the space between the lip and the teeth. There was also burning pain in the face, in the arm and her neck-chest area, which caused great mental distress, a huge emotional toll, specifically being upset and devastated, lack of sleep, and weight lost due to lost of appetite with 5 pounds being lost within 2 weeks of these side effects. On an unspecified date in 2021, patient experienced hypersensitivity reaction. Patient stated that when she was changing her outfit she accidentally pinched her arm and the pain was more than expected and it left a bruise. About 7 hours after, she noticed that her mouth started to burn. She mentioned that she also had pineapple that day and was not sure if it was caused by the vaccine. On the 09Mar2021, she consulted a nurse practitioner who said that the burning may have been caused by the Pineapple. On 10Mar2021, she consulted her allergologist and got tested for a pineapple allergy. The results came in on 15Mar2021 and they came back negative for the allergy, but her allergologist mentioned that pineapple can still irritate the mouth. On 18Mar2021, she consulted with her Primary in which she was given magic mouthwash that made it worse. She was made to continue her benadryl and aspirin spray. On 20Mar2021, that Saturday night, as she was walking, she felt that her legs were heavy and felt like they were weighted, which made it difficult for her to walk. It lasted for about 20-30 minutes before subsiding. Last Monday, 22Mar2021 she really started to notice the burning pain on her lower lips, specifically in the space between the lip and the teeth. There was also burning pain in the face, in the arm and her neck-chest area. She described it as not constant but comes and goes. On 25Mar2021, she consulted with her primary again in which she was recommended not to get the 2nd dose of the vaccine and her side effects lean to a more neurologic cause. The doctor mentioned that the vaccine was still too new. These side effects has caused great mental distress, a huge emotional toll, specifically being upset and devastated, lack of sleep, and weight lost due to lost of appetite with 5 pounds being lost within 2 weeks of these side effects. She said that has not been fun. it has been horrible, and she would choose dying over this burning sensation in the mouth. Patient visited physician Office, 3 times and allergist did it virtually. Reportedly, after eating dinner she was eating pineapple from a can. She had the can and tried it. She had not had pineapple in a long time. While sitting in her recliner, she experienced her mouth burning. She added that began about an hour and a half after eating the pineapple and it has lasted for approximately 2 weeks. It was not constant all the time. She did not know at the time if the burning in the mouth was related to the pineapple. Caller added they thought it was the pineapple causing this. Last Sunday, the caller indicated that it was leaving and going away. Caller saw her new primary medical doctor on 09Mar2021. The Nurse Practitioner said it was probably the pineapple, She started her on Benadryl. Manufacturer was unknown to caller. Caller took 2 tablets on 09Mar2021 and stopped taking it on 10Mar2021. She restarted taking the Benadryl on about 14Mar2021. Caller stated she was primarily calling and asking because on Monday, 22Mar2021 she started having burning in her face and had burning in her arm.  Caller reported the burning in her arm was not from the vaccine and she thought it was caused by her blood pressure cuff.  Caller took her own blood pressure. Burning was better today, she still had burning in her arm. She took Zyrtec as instructed by her physician twice a day. She took a half tablet on 10Mar2021 through 13Mar2021. She was taking half a tablet in the morning and a half tablet at bedtime. Caller added that the Zyrtec made her feel unsteady and it made her sleepy. She did not tolerate it. Dose was 10mg. She has recovered completely from unsteady and being sleepy with Zyrtec. Caller took Tylenol because she was having sinus issues. She did not have the manufacturer, she took it on 12 and 20, two times. Its 325mg, by mouth, the regular strength. Caller saw an allergist on 10Mar2021 who tested her for pineapple allergy. The Allergist called on 15Mar2021 and reported she was not allergic to pineapple. Allergy was also tested for egg white, milk, wheat, corn, peanut, soybean, potato, yeast, and tomato. All resulted as negative. Benadryl: took 2 times in 09Mar2021. Caller restarted Benadryl and took it on 14Mar2021-17Mar2021. These days she only took it in the evening. She took 25 mg at night. Then she took Flonase, twice, on the 17th and 18th. Its over the counter. Lot number: TE8G, caller doesnt have box to provide UPC, stated there was another number of 0140592, expiry Mar2021. Dose was 27.5mcg per spray, spray into each nostril. When providing strength, states writing was so small for her to see. Gets a magnifying glass to confirm strength, states it's with her age. The doctor also suggested for the caller to try Afrin spray on 18Mar2021.  Caller started it on 20Mar2021 and used it only once. She didnt like it. Caller said at her age she occasionally breaks out and uses Clindamycin for that. Dermatologist has her using Clindamycin 1 per cent pledgets. Applied twice to face once daily, She stopped 20Mar2021. Given Magic Mouthwash, which was in a pharmacy bottle, she took it once on 18Mar2021, but stopped. It was 5-10ml swish and spit. It made things worse and did not improve it. The doctor forgot to give her a measuring cup, and caller thought she told her a teaspoon. Caller added she tried using a warm cloth on her sinus area and her skin felt like a sunburn. The cloth left a red area around her cheek. Then this Sunday, after using the pledgets, went for a walk, next day noticed her face was really burned, not just face, her neck, arms, but she was not exposed, but had a burning pain, and she still continued to have it.  She asked the dermatologist if this could be caused from the Clindamycin. The dermatologist told her no. She took a walk on Saturday and did not know if she was dehydrated.  She felt like there were weights on her feet as she walked. It lasted 30 minutes. The burning in mouth started 7 hours after the first dose and it had improved. Therapeutic measures taken in response to the events included Benadryl, Zyrtec, Tylenol, Flonase, Afrin spray, clindamycin, magic mouthwash. Outcome of the events "mouth started to burn/burning in mouth" and "sinus issues" were ongoing-not recovered and for all other events were unknown at the time of report.  Information on Lot/Batch number has been requested.