Ice packs usually refer to laying or wrapping ice packs around inflamed areas such as trauma and joint pain to achieve analgesia and inflammation. Sports muscle strains, shoulder and neck pain, tenosynovitis, joint pain, acute sprains and strains, ......Many injuries can be relieved with the right type of ice.
It is widely used by sports coaches and doctors as one of the methods to relieve muscle tension. The human body is like a delicate instrument, it will be sensitive to fever anywhere more than 1, and proper ice compresses can help to reduce fever and regulate body temperature, thereby relieving the discomfort caused by injury. 
Note:Apply ice as soon as possible after the injury. Alternating between hot and cold is also a way to relieve pain, but heat therapy can enhance the acute inflammatory response, so do not apply heat to the affected area when it is swollen, and apply cold therapy ice first. After 24 hours (depending on the actual situation, generally within 1 3 days), swelling and internal bleeding stop, and hot compresses can be taken to promote blood circulation, which is conducive to the recovery of local wounds. Let's start with when ice is needed:Sports injuries1.Ankle sprain. The ankle joint is suddenly stressed, and the ligaments that connect the bones and the joint capsule that surrounds the joint are damaged, causing inflammation. 
2.Multiple bruises. After the violent impact, the subcutaneous, muscles, blood vessels, etc. are damaged, and internal bleeding and swelling appear. 3.Muscle fever and fatigue after workout. Stretching can help to restore muscle recovery as the nerves around the muscles can paralyze and relieve pain when ice is applied properly. ......Everyday life1.Flash waist. Acute low back pain attacks within 3 days, the inflammation will be very severe, try to stay still and ice the waist can relieve the pain. However, it is best not to apply ice to chronic low back pain, as cold may lead to poor blood circulation and aggravate the condition. 2.Stiff neck. Stiff neck can cause neck sprains, shoulder pain, inflammation of the surrounding muscles, and in severe cases, rare severe pain and fever. 3.Tenosynovitis. Modern people who frequently operate mobile phones and computers are prone to tenosynovitis, and can use a small Xiaoice bag to ice their hands for a while. 
3 effects of iceRelax + slow down nerve conduction + constrict blood vesselsAllowing the hot part to cool down has a significant pain relief effect. Apply ice cubes for 5 to 10 minutes, the temperature of the surface will drop, the nerve conduction speed will also slow down, and the person will become dull when he feels pain. Ice can also constrict blood vessels and capillaries that have broken due to bumps, reduce bleeding, and reduce swelling and pain. Basic First Aid Methods – RicePartial sedation (rest) - cold compress (ice) - compression (compression) - elevation (elevation). Together, the initials of this series of measures are called rice. This method is particularly effective for acute localized pain, where applying ice before the fever destroys the tissues can reduce cell viability, inhibit the secretion of substances that cause inflammation, and minimize damage. 
RestKeeping the injured area as still and immobilized as possible after an injury, as reluctant movement can worsen it. · ICE (cooling) uses ice to cool the swollen area, reducing the spread of pain and heat. · Compression: Applying pressure to the injured area to effectively suppress internal bleeding and swelling. · Elevation: Lifting the injured area above the heart as much as possible to reduce blood circulation and reduce bleeding and swelling. The right way to apply iceHomemade ice packs: Put ice cubes in a plastic bag and suck up the air in the bag, wait for the air inside, tie the bag tightly and apply it to the painful or hot area. 
When is ice effective? As soon as possible. Apply ice for 15-20 minutes each time. The order of feeling is "cold, hot, numb, and insensitive", and you can stop at the third step of "numbness". If fever and pain soon return, ice can be applied again. 
Over-iced beware of frostbite! Do not use dry ice directly on the human body for a long time to apply ice (such as applying it while sleeping), put a towel between the ice pack and **, people with diabetes, alcoholic peripheral neuritis and other local sensory nerve retardation, rheumatoid, nervous hypersensitivity (symptoms of episodic constriction of the arteries due to cold or nervous fingertips), cold allergy (cold intolerance caused by **hypothermia) and people with poor blood circulation are not suitable for ice. Use cooling sprays, gels, and coolantsIn addition to ice compresses, in order to relieve sudden pain during physical training, topical preparations such as cooling sprays, liniments, and gels are often used as emergency measures, and then used with patches.