Having just seen Becky's question on flu jabs I thought it might be helpful to mention for the benefit of all that to stop the 'painful or stiff arm effect' after having the flu jab - immediately really rub the muscle of the arm where the injection point was. It must spread it out I guess, get the nurse to do it if you cant manage yourself.
This has always worked for me - hope it works for others. We suffer enough aches and pains already ! (One less I consider a bonus especially when this remedy is so simple)