1. Clogged injection needle: Sometimes the needle may become clogged with insulin or other substances during use. This may result in not being able to inject insulin properly. The solution is to first check whether the needle is intact or not, and if it is damaged you need to replace it with a new one. The air can then be pushed out by gently twisting the knob at the bottom of the injection pen to remove the clogged substance.

2. Difficulty in adjusting the dose: Sometimes, difficulty may be encountered in re-adjusting the dose. This may be due to a stuck or inflexible knob. The solution is to make sure that the knob is not loose and that it can be turned freely. If the knob is still stuck, try turning it with appropriate force, but be careful not to use excessive force.

3. Insulin Leakage: Occasionally, there may be a problem with insulin leakage. This may be due to a bad seal or other reasons. The solution is to first check if the product is intact and make sure that all parts are properly connected. If a leak is found, the product should be replaced with a new one immediately.

4. Dose display error: Sometimes the dose display may be incorrect during use. This may be due to low batteries or other technical problems. The solution is to first check if the batteries need to be replaced and make sure they are working properly. If the problem persists, recommend a medical professional or the manufacturer for further assistance.

5. Difficulty in use: Some people may have difficulty in use, especially for those with poor manual dexterity. Solutions include the use of grip extenders or other aids to increase grip strength and stability. In addition, medical professionals can be consulted for advice and guidance tailored to individual needs.

In conclusion, disposable insulin injection pens play an important role in diabetes management. However, some malfunction problems may be encountered in the process of using them. By understanding the common malfunctions and the corresponding solutions, people with diabetes can better cope with these problems and ensure smooth insulin injections. If you encounter problems that cannot be resolved, it is recommended that you consult a healthcare professional or the manufacturer for further assistance and guidance.