Ice is usually used when there is noticeable swelling. Ice relieves the swelling and removes the pressure on the nerves. See the related link for further information.
Pain relief
Runners with knee pain should use ice for relief, as it can help reduce inflammation and numb the area, providing temporary relief from pain. Heat may worsen inflammation and should be avoided in the acute stages of injury.
Using cold and heat packs is an effective way to get pain relief, regardless of the reason behind your injury. If you have an injury that involves swelling, ice packs should always be used. This is usually done for temporary injuries, such as spraining an ankle. If you have long standing pain, heat packs should be used instead to ease the pain. This is usually done for chronic pain conditions, such as Fibromyalgia or arthritis.
It is generally safe to put ice on your testicles for pain relief or swelling, but it is important to use a barrier like a cloth to protect your skin. If you experience any discomfort or prolonged numbness, remove the ice immediately.
Besides using acetaminophen or ibuprofen which are pills used to relieve pain, try using a towel with ice in it and placing it in the sides of your head.
Some ways for back pain relief include long hot baths while closing eyes. Another method is to ice the lower back for an hour while resting in bed. These methods should give some relief for the back pain.
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No. Pain relief medicines will not give much relief from the pain of appendicitis. Only narcotic analgesics like morphine can give you pain relief from pain of appendicitis. They should not be used in acute abdomen, unless you obtain written consent for operation.
if your intention is to drain the abscess, heat. for pain relief, cold.
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Yes, Heroin was used in the UK and the Netherlands as pain relief, it was used after surgery pain relief and also in other pain medications. I'm not sure if it is still used though, I think they now use morphine as an alternative.
There are many ways of relieving pain. Drugs like NSAIDs have long-time used to remove pains. Besides, doing exercises and massaging are also good methods to comfort some pains. With the combination of some other factors like warm water or ice in massage, the efficiency of pain relief will be more pronounced.