Avoid troubles when injecting insulin

You should pay attention to the following

Pen needles are disposable products. Use a fresh needle with every injection - for the sake of your health!

Using a pen needle more than once can lead to undesirable consequences:

Unnecessary pain, because the lubricious silicone coating was worn off during the first injection
Unnecessary pain due to a blunt needle tip
Inaccurate insulin dosage and clogging of the needle due to crystallized residual insulin from previous injection
Lipohypertrophy due to the smallest injuries at the injection site

If the needle is too long, the insulin could be accidentally injected into the muscle tissue
Solution: the correct needle length is determined during diabetes training
If the needle is too short, insulin may not have the required effect.
Solution: the correct needle length is determined during diabetes training

Injection through clothing should be avoided at all costs, as fibres from the fabric or dirt particles could get under the skin. This could cause painful infections, which are absolutely avoidable with hygienic injections. A further disadvantage is that the extremely finely tip of the pen needle could be bent when penetrating clothing, making the injection painful.
The injection site should also be checked for blood or insulin leakage after each injection, which is not possible when injecting through clothing.