| Is it the needle sting or the insulin being injected that causes your mom's pain? Some people have trouble with very fast injecting of the insulin and the answer is to slow it down.
I found that doing a "one-two-three" count and getting it over with was the best for the needle sting. If your mom waits for about five seconds, she may experience the pain lessening due to release of endorphins and then can release the insulin.
The sting might be due to muscle tension. Be sure she is injecting into fatty areas because insulin injected into muscle works much faster than it should. The little needles used for insulin are rarely long enough for injecting into muscle, so this probably isn't the problem.
As a last resort, sometimes new diabetics find the use of an automatic injector (look up Busher Automatic Injector) to be a comfort. It always gets the angle and depth correct and lessens the anticipation of injecting oneself.
Mich | 
