Does injector needs to change the needle after each single injection?

Dear Rachel raheleh,Thank you for your question. Although it is not required to change the needle in between injections. Sometimes the injector switches them throughout, but this is primarily just because it is less uncomfortable when the needle is not dull. Best of luck to you!

Dear Rachel RahelehThank you for your question - the answer is No, An injector should use the size of needle needed for precision injection.With Warm RegardsTrevor M Born MD

There is no need to change needles with each injection when done for one area. Sometimes after a few injections the needle can become dull at which time a needle change maybe needed.

This is entirely the preference of the injector, and there is no right answer.  However, I do prefer to change needles frequently.  After a few sticks the needles become dull which can lead to more discomfort as well as more tissue trauma (leading to bruising and swelling).  I do this with fillers but also with Dysport or Botox injections.  

Needles need only be changed when it is dull, to aid in patient comfort. Changing is not always necessary.
Merry Christmas,
Dr Daniel Chang

The needle can be changed as it dulls. This is a matter of injector technique and would also be dependent on the amount of product being injected.

Hello. Thank you for your questions. It is not necessary for the injector to change the needle during the procedure. Sometimes, for comfort, the needle may be changed out halfway through because it has dulled, but this is not always the case. 

No, an injector does not need to keep changing the needle during treatment. However, after a few need sticks, the needle may dull and then it should be changed to reduce discomfort. 

If the injector feels comfortable with the needle's sharpness, he does not need to change it. Good luck from New York City

No you do not need to change needles with injections. I use cannulas and also do not change them with each insertion, however with cannulas you need  fewer punctures. The face is extremely forgiving from infections having stated that any time you break the skin you can develop an infection.