dermatomyositis; lose her balance and strenght; lose her balance and strength/weak; she couldnt even get in the bed without assistence; This is a spontaneous report received from a contactable reporter(s) (Consumer or other non HCP). The reporter is the parent.  A 5-year-old female patient (not pregnant) received BNT162b2 (BNT162B2), on 21Jan2022 at 15:45 as dose 1, single (Batch/Lot number: unknown) at the age of 5 years, in right arm for covid-19 immunisation. The patient had no relevant medical history. There were no concomitant medications. The following information was reported: DERMATOMYOSITIS (caused and prolonged hospitalization, disability, medically significant, life threatening) with onset 30Jan2022, outcome "not recovered"; BALANCE DISORDER (caused and prolonged hospitalization, disability, life threatening) with onset 30Jan2022, outcome "not recovered", described as "lose her balance and strenght"; ASTHENIA (caused and prolonged hospitalization, disability, life threatening) with onset 30Jan2022, outcome "not recovered", described as "lose her balance and strength/weak"; LOSS OF PERSONAL INDEPENDENCE IN DAILY ACTIVITIES (caused and prolonged hospitalization, disability, life threatening) with onset 30Jan2022, outcome "not recovered", described as "she couldnt even get in the bed without assistence". The patient was hospitalized and prolonged hospitalization for dermatomyositis, balance disorder, asthenia, loss of personal independence in daily activities (hospitalization duration: 60 day(s)). The events "dermatomyositis", "lose her balance and strenght", "lose her balance and strength/weak" and "she couldnt even get in the bed without assistence" required physician office visit and emergency room visit. The patient underwent the following laboratory tests and procedures: Biopsy muscle: dermatomyositis; lab test: dermatomyositis.; Magnetic resonance imaging: dermatomyositis.. Therapeutic measures were taken as a result of dermatomyositis, balance disorder, asthenia, loss of personal independence in daily activities.  Clinical information: Adverse event: wow its so sad. starting in Feb (2 weeks after shot) my perfectly energetic and healthy 5 year old daughter (name withheld) started to lose her balance and strenght. WE had no idea what was going on. Within 4 more weeks she couldnt even get in the bed without assistence and then she noticed a strange pepper spotted rash around her joints and eyelids. she was so weak. On 06Apr2022 her mother took her to the hospital and after they took labs they rushed her to the hospital by ambulance. After tons of testing, MRI and finaly muscle biopsy she was finaly diagnosed with dermatomyositis. (Name withheld) has endured physical therapy , weekly methotrexate injections, monthly ivig treatments. bi weekly labs. my baby has been poked and traumatized . Patients mother was angry and pissed off and feel that pfizer was responsible. The doctors have said that vaccines can "trigger' these events an that its no coincidence that rhumatology was full across the country. Adverse event resulted in: [Doctor or other healthcare professional office/clinic visit, Emergency room/department or urgent care, Hospitalization, Life threatening illness (immediate risk of death from the event), Disability or permanent damage]. Patient was treated with: ivig, methotrexate, steroids, physical therapy, biop. No covid prior vaccination and post vaccination. No known allergies and none medical history was reported.  The information on the batch/lot number for BNT162b2 has been requested and will be submitted if and when received.