Speaking of cold compress, let's first introduce the knowledge about cold compress. Cold compress is based on traditional cold compress methods such as cold water, ice water and alcohol. TDDS new drug delivery system takes polymer gel as the core, and consists of backing layer, gel layer and anti-sticking layer. It can make local capillaries contract, relieve local congestion, reduce the sensitivity of nerve endings and relieve pain, reduce temperature and fever, reduce local blood flow, and prevent inflammation and purulent diffusion. It can disperse heat conduction in the body, increase heat dissipation and reduce body temperature. Cold compress is suitable for early local soft tissue injury, high fever patients, heatstroke patients, toothache and other people who need cold compress. Medical cold compress is very common in life. Let's look at the role of medical cold compress:

The principle of medical cold compress is very simple, that is, according to the vaporization of water contained in the product and natural cooling components, the local cooling effect is achieved. After the drug is combined with hydrogel, the drug components quickly penetrate through the fat layer and penetrate into subcutaneous tissue, so as to achieve the effects of cold compress and pain relief, transdermal absorption and slow-release administration.

Cold compress has five functions:

Function 1: phlebitis type, suitable for phlebitis and local swelling and pain caused by intravenous infusion;

Function 2: the brain-refreshing type can relieve the head pain caused by work or school tension, and then it will be better after cold compress;

Function 3: antipyretic type, which is a traditional cold compress to reduce fever and treat fever, headache, irritability and nasal congestion caused by cold;

Function 4: eye protection type, suitable for eye fatigue, eye astringency, eye pain and dry eyes caused by excessive use of eyes, which will be greatly improved after cold compress;

Function 5: Bone injury type, suitable for pain caused by bone injury, which can be relieved after cold compress.

The reason why cold compress is chosen is that it is more convenient and comfortable, and it lasts for a long time, and it has no irritation to the body and skin. After use, the human body is more comfortable and soft, and it can be used in any occasion.

However, the cooling range of cold compress is relatively limited, generally around 3-5 degrees Celsius, and because the skin barrier is around, the game components can not penetrate, which is also the shortcoming of medical cold compress.