 [ Symptoms ] i have a reaction from the flu shot i received [ Disease ] hi most likely these can be allergic reaction to the flu shot but as u mentioned last year u had the same shot without any complications so other possibilities like allergic dermatitis and fungal infection should also be kept in mind apply local anti histaminic and anti fungal creams take anti allergic tablets it may take around 3 4 weeks to resolve consult a dermatologist thanks