First, before using any plaster, patients should carefully read the instructions to understand its ingredients, applicable scope, contraindications, precautions, warnings, and other helpful information. Before applying the plaster, locate the affected area and ensure the center of the plaster is aligned with the center of the lesion. Clean and dry the affected area or acupoint with a hot towel before application. If there is long hair on the affected area, shave it first to avoid affecting the plaster's adhesion or causing pain when changing the plaster.
In cold winter weather, rubber-type plasters may not adhere well. In this case, apply a hot water bottle after applying the plaster to ensure a firm bond and enhance the therapeutic effect. If using black plasters, warm them over a low flame (such as an alcohol lamp, candle, or lighter) until they are no longer too hot to apply to the affected area. Be careful not to overheat them to avoid burns or spillage. Note that plasters should not be heated over a gas stove, as harmful gases such as carbon monoxide and sulfur dioxide produced during gas combustion will be absorbed by the plaster and then enter the body through the skin, harming health.
If, after applying the plaster, you experience itching, burning, or stinging at the application site within about 10 minutes, stop applying it immediately. This indicates an allergic reaction to the plaster, and anti-allergy treatment should be initiated. When applying the plaster, ensure it is smooth and wrinkle-free. When applying plasters to joints, use cloth tape to secure them in place to prevent them from falling off. Generally, a single application of plaster should not be used for more than 24 hours. Prolonged use will not only diminish the effectiveness of the medication but also increase skin irritation.
