Precautions1. Before use, the wound surface should be thoroughly cleaned and the skin around the wound should be dried; 2. It should be selected the hydrocolloid dressing that is about 2 cm wider than the edge of the wound to ensure adequate adhesion to the skin; 3. If the depth of the wound exceeds 5mm, a suitable material should be selected to fill the cavity before using the hydrocolloid dressing; 4. Not suitable for wounds with a lot of exudate; 5. It is normal for the dressing to bulge and whitish after absorption and swelling. When the absorption is saturated, it is prompted to change the dressing; 6. In the early stage of using hydrocolloid dressings, sometimes it may be found that the wounds expand instead, which is caused by the decontamination effect of the dressings, which is a normal phenomenon; 7. As the hydrocolloid molecules fuse with the exudate in use, a gel is formed. Sometimes it looks like a purulent discharge, so it is mistaken for wound infection. At this situation, rinse with normal saline. 8. The use of hydrocolloid dressings sometimes produces a certain odor, which disappears after cleaning the wound with saline. 9. If there is leakage around the paste, please change the dressing immediately.