difficulty walking like arthritis attacked his joints and knees; difficulty walking like arthritis attacked his joints and knees; pain in his hip; 1st dose of the Pfizer COVID Vaccine was a scratch mark; skin reaction; This is a spontaneous report from a contactable consumer (patient, self-reported) via medical information team. A 64-year-old adult male patient received BNT162B2 (PFIZER-BIONTEC COVID-19 mRNA VACCINE, Solution for injection, lot/batch number and expiry date were not reported), via an unspecified route of administration upper arm of the left-hand side, on 07Apr2021 at 08:30 AM (age at vaccination: 64 years), as a dose 1, single for COVID-19 immunization. The patient's medical history and concomitant medications were not reported. Prior Vaccinations (within 4 weeks) was none. Family medical history relevant to ae was one. The patient had covid in February with mild symptoms and he recovered from covid in one week. On an unspecified date in 2021 the 1st dose of the Pfizer COVID Vaccine was a scratch mark and a skin reaction and pain in his hip. On an unspecified date in Apr2021, 1 week after first dose the patient had difficulty walking like arthritis attacked his joints and knees. Due to a scratch mark and a skin reaction the 2nd dose was put a little up above that for the 2nd dose. Reportedly the patient used to have this from gluten products. It was reported that the patient had no side effects for one week after the 1st dose of the Pfizer COVID Vaccine and after that his body was slanted 45 degrees and he had to take his weight to the backside of his body to balance and had pain in his hip. It was reported that he cured himself and required no further treatment using the Melatonin and has some kind of memory of reading where some HCPs in administered Melatonin to moderate immune symptoms or people with immune systems and it attached to the lung cells; states some HCPs experiment with Melatonin and it worked in some patients. It was reported that the patient took 3mg melatonine instead of glucocorticoids and it helps in 1-2 days. Melatonin the patient took was 3mg and was a neurotransmitter like serotonin and was the Simple Truth brand and has expiry date May2023, with a manufacturer number of 04120412x604378 and states he is unsure which of these numbers is the lot number; states for the Melatonin it has UPC number 041260335891, and it has 60 tablets in it. The patient stated that states it does not have the lot number on the bottle to provide. Caller states he wanted to report this information and it was good and worked for him and maybe it would work for some people that experience the same difficulty with bone slanting or if they have a gluten sensitivity or autoimmune or something like that and he wanted to forward it to be useful to this group. Caller stated his blood group is orange plus; no further details provided by the caller. States after every dosage of the Pfizer COVID Vaccine he went to a waiting room where they monitored people and was there for 15 minutes in case something happened to patients and he walked away after the time limit and had no problems and after 3-4 hours the symptoms started with the 2nd dose. It was reported that patient read people who got infected with had their immune system elevated 140x times. The reporter queried are those side effects from the vaccine. It was reported that the patient was calling because he wanted to know if this true and also had other questions regarding side effects for medication and efficacy; no further details provided. It was reported that the need for a booster dose of Pfizer-BioNTech COVID-19 vaccine based on duration of protection or impact of variant strains has not yet been determined. On 25Feb2021, Pfizer and BioNTech announced they initiated an evaluation of the safety and immunogenicity of a potential third dose of the Pfizer-BioNTech COVID-19 vaccine (BNT162b2) to understand the effect of a booster on immunity against COVID-19 caused by the currently circulating and potential newly emerging variants. It is important to have a vaccine technology that allow provide boosting doses if needed and to address potential changes in the virus itself if a new variant emerges that the vaccine does not protect against. The administration of more than a 2-dose series of Pfizer BioNTech COVID-19 Vaccine is not approved. This report was a Product Complaint. Outcome of the event was unknown for the events.    No follow-up attempts are needed; information about lot/batch number cannot be obtained.