Why does the area where the plaster is applied itch?

When our body is injured, we can choose to apply plaster as a treatment method. Nowadays, there are many types of plasters available for people to use. It is recommended that you keep your eyes open when choosing to avoid being deceived. Many friends have said that although the ointment has a certain effect, the skin where the ointment has been applied will become itchy, which is most likely a manifestation of allergy. So how can this situation be alleviated?

How to relieve itching with plaster?

Skin itching caused by plasters is an allergic phenomenon. You can massage the surface of the plaster appropriately. If there is no obvious improvement, you need to remove the plaster in time. You can apply ointment such as Piyanping to the affected area, or take oral chlorpheniramine for treatment. Never scratch the affected area hard, so as not to damage the skin and mucous membranes and aggravate the infection.

When using plasters, patients should choose the type with ventilation holes. Wash the affected area with warm water before applying it. After the application time reaches about one day, it should be removed as soon as possible to avoid triggering allergies again.

Can the ointment be used after it expires?

Every medicine has a shelf life. The shelf life of a medicine refers to the approved period of use of the medicine, which shows the period during which the quality of the medicine can be guaranteed under the specified storage conditions. This is one of the indicators for controlling the quality of the medicine. Generally, the shelf life of a medicine is two years. It is necessary to keep it in the specified effective storage conditions and use it up within the validity period as much as possible to ensure the effectiveness of the medicine. During use, be sure to check their properties at any time. If any of the above conditions are found, stop using it even within the validity period. It is best not to use expired medicines because the chemical composition inside has changed, the efficacy has lost effect, and even harmful substances may be produced.