1. The insulin pen is generally placed in the refrigerator, and can be taken out a few minutes in advance and placed in room temperature to prevent the pain caused by the cold from increasing and causing discomfort.
2. The injection should follow the principle of "two fast and one slow"-that is, the needle is fast, the bolus is slow, and the needle is fast. After the injection, stay for 10s and pull out the needle to prevent insulin overflow. Pull the needle in the direction of the needle to avoid exacerbating pain.
3. The injection site should be rotated frequently, avoiding sclerosis, infection, and damaged skin. The injection needles should be changed one at a time to prevent the needles from forming barbs to increase the wound surface and increase pain.