Filler injections such as hyaluronic acid are widely popular in improving appearance and optimizing facial proportions. Among them, lips are one of the visual focal points of the face, and plump lips are the focus of many beauty seekers. Plump lips can enhance harmonious beauty of the face, making the face look younger and more energetic.
With the continuous optimization of injection tools, Lip Cannula has gradually become an important choice for doctors to perform lip injections. Compared with traditional sharp needles, lip cannula can make the entire injection process safer with its blunt cannula, reduce the chance of bleeding, and lead lip injections to a more comfortable direction.
What is Lip Cannula?
Lip Cannula refers to a blunt-tipped injection needle specifically used for lip injections. Compared with traditional sharp needles, its biggest feature is the blunt cannula tip design. This design makes it difficult to puncture blood vessels or nerves, but rather performs a "sliding" injection through the tissue gap.
Lip cannula is usually made of flexible stainless steel material. The cannula body has a certain flexibility. After insertion, the injection angle can be adjusted back and forth without breaking the cannula tube. It is used for lip filler injection. It can be inserted from one incision to complete the filler injection of the entire lip. The blunt cannula can adapt to the complex physiological and anatomical structure of the lips and achieve more uniform injection.
In addition, the length and caliber of the lip cannula also vary depending on the injection needs. Common specifications are 25mm, 38mm and 50mm, and the needle thickness is usually between 27G and 30G.
Its principle of use is to use one or two small incisions as the needle entry point, penetrate the blunt cannula into the lower layer of the skin, and push the filler in a specific layer to achieve the effect of full lips.
Blunt Cannulas VS. Sharp Needles
In the practice of lip injection, doctors often face a key choice: should they use traditional sharp needles or blunt cannula?
Sharp needle: The needle is sharp and can directly puncture the skin. It can be accurately injected point to point. It is often used for edge carving parts such as lip lines and lip peaks. Sharp needles need to pierce the skin multiple times. Due to the sharpness of the sharp needle, the blood vessels of the lips will be punctured during injection, causing bleeding of the lips and bruising after surgery. These are the negative effects of sharp needle injection.
Blunt cannula: Blunt cannula adopts a non-cutting blunt head structure. Its needle tip is shaped like a bullet. During the injection process, it slides in the tissue to reduce damage to blood vessels, nerves and other tissues. It is very suitable for large-area injections, including cheeks, foreheads and jaw lines. Similarly, it is also suitable for hyaluronic acid filling of the lips, which can reduce the negative impact on the lips, reduce its trauma, create a uniform injection effect, and bring natural lip plumping.
The following table summarizes the main differences between the two:
Comparison Aspect |
Lip Cannula |
Sharp Needle |
Needle Structure |
Rounded, blunt tip, no sharp incision |
Sharp, pointed tip, can directly pierce tissue |
Insertion Method |
Few entry points, gliding advancement |
Multiple puncture points |
Risk of Bleeding/Bruising |
Very low |
Relatively higher |
Applicable Areas |
Entire lip area, inner lip tissue filling |
Lip contour, lip peak detailing |
Post-Operative Recovery |
Short recovery time, mild pain |
Longer recovery time, possible redness and swelling |
Difficulty Level |
Requires mastery of layers and direction, higher |
Relatively lower |
Main Advantages of Lip Cannula
The advantages of lip Cannula are obvious, especially in the three aspects of "comfort, safety, and efficiency", which meets the current requirements of beauty seekers for minimally invasive surgery, that is, they hope that the operation can be safe while bringing natural effects and rapid recovery.
1. Improve injection safety
The lips are an area with dense blood vessels, and important blood vessels such as the labial artery pass through it. It is often seen on social media that after the mouth is filled, the lips will swell and bruise the next day. Sharp needles can easily injure blood vessels during the injection process, which may cause bruises or even embolism.
The blunt cannula slides through the tissue gap and will not puncture blood vessels during the injection process, greatly reducing the risk of blood vessel puncture. It is a very safe injection tool.
Diaminy Lip Cannula uses high-quality materials to ensure the safety of the product. The high-quality materials also make the needle flexible and can be bent at will with the operation of the operator without breaking easily.
The needle tip of Diaminy is smooth and the insertion is very smooth. By sliding and pushing, the doctor can accurately distribute the filler to the required area.
2. Reduce Bruises and Swelling
The sharp needle needs to pierce the surface of the skin before the blunt cannula is inserted. Often only a few punctures are required, so the blood vessel structure will not be damaged during the injection process. After the lip cannula is injected, there is usually no obvious bruising or swelling on the lips.
Most patients can return to their natural state within 24 hours, and it is very suitable for large-area filler injections, such as cheeks and foreheads, or injections in body parts. It is a very suitable injection tool.
Only puncturing a few skin entrances can achieve large-area subcutaneous injections, successfully reducing postoperative swelling.
3. Injection is more natural and uniform
Blunt cannulas can achieve linear filling over a longer distance, so that fillers such as hyaluronic acid are evenly distributed in the tissue layer, and it is not easy to have lumps and unevenness, which will make the injection effect more natural and charming.
4. Higher comfort
Blunt cannula injection only needs to set 1-2 needle points, which can greatly reduce the frequency of skin puncture and reduce the patient's pain. Moreover, after the anesthesia subsides, there will be no more severe pain, only slight tingling or no pain at all.
Application Scenarios of Lip Cannula

As an efficient and safe tool for lip injection, the blunt cannula can be used to improve a variety of lip problems. It can easily create popular mouth shapes such as Russian lip. It is mainly suitable for improving the following lip problems:
- Flat lips and lack of three-dimensional sense
- Increased lip lines and dry lip vermilion caused by age
- Mild asymmetry of lips or blurred lip peak
- Need to be modified and supplemented after lip filling surgery
- Natural and soft transition of lip contour
Key Points and Precautions for Injection Operation
Although Lip Cannula has many advantages, its operation requirements are relatively high. According to the operation of many injection doctors, we have summarized a few key points that can help injection doctors operate the blunt cannula smoothly.
Select the appropriate specifications: According to the thickness of the patient's lips and the filling layer, reasonably select the needle length and caliber. Lip filling mostly uses a blunt cannula with a caliber of 27G-30G and a length of 25-38mm.
Determine the safe insertion point: Choose the midline or corner of the mouth close to the lip vermilion line as the insertion point, and avoid the main trunk of the labial artery. Choosing a safe injection point can help the whole operation go smoothly and ensure that the operation is less bleeding or no bleeding.
Control the sliding layer: It is recommended to perform sliding injection under the dermis, avoid entering the muscle layer or too shallow to prevent nodules or unevenness, and master the depth of injection, which is the second key point to pay attention to for filling.
Keep the technique steady: The injection should be pushed slowly and evenly during the injection process, and observe the changes in lip shape while injecting to ensure the natural transition of the filler.
Lip cannula aftercare: Avoid hot compresses, pressing or makeup after surgery to ensure that the filler is stably formed and prevent displacement.
Market Development and Trend of Lip Cannula

With the rapid growth of the global medical beauty industry, the frequency of use of Lip Cannula has increased year by year. In Europe and the United States, blunt cannula injection technology has become one of the conventional operating standards for lip filling, especially in countries such as France and Germany that focus on natural facial transition. Lip cannula is almost the first choice for professional injectors.
In the future, consumers will pay more attention to low trauma and fast recovery, and the popularity of Lip Cannula will be further improved. At the same time, with the improvement of the technical training system, more doctors will master the blunt cannula injection operation to ensure the safety of filler injection.
Conclusion: Lip Cannula - the mainstream choice for lip injection in the future
Lip Cannula is a more gentle, safe and delicate injection tool, which will gradually be recognized and accepted by operating physicians. It can be used not only for lip injection, but also for facial and body injection.
Diaminy aesthetics store provides high-quality blunt cannulas for lip filler injection, providing operators with a safe injection tool and providing patients with a pleasant injection experience.