Ice Therapy - Why On & Off?
A question I’m asked regularly in clinic is, “Why do you tell me to put ice on and off rather than just leaving it there?”
As a principal osteopath, I often advise patients to use ice for 10 minutes, remove it for 10 minutes, then repeat this cycle two or three times. In some situations, particularly when there is ongoing inflammation or persistent muscular tension around the area, I may also suggest alternating ice with heat.
After 15 years + working privately as an osteopath, I have found that patients who understand an issue tend to follow advice better and recover sooner. Plus, they tend to have a better outlook on their painful problem as due to more of an idea of what to expect in their progression/prognosis and when they will be getting back to their everyday tasks.
The reason behind this advice comes down to how our blood vessels respond to temperature.
When you apply ice to an injured or inflamed area, the blood vessels constrict. This process is called vasoconstriction. It helps reduce excessive blood flow into the area, which can help calm swelling, irritation and pain. Cold can also reduce the sensitivity of local nerve endings, which is why it often provides pain relief.
Once the ice is removed and the tissues begin to warm again, the blood vessels widen. This is called vasodilation. Heat also encourages vasodilation directly, increasing local circulation.
The theory behind alternating cold and warmth is that this repeated narrowing and widening of the blood vessels creates a type of “pumping” effect within the tissues. The aim is to encourage healthy circulation into and out of the area, helping to move inflammatory waste products away while bringing oxygenated blood and nutrients back in to support healing.
In rehabilitation and sports medicine, this is often referred to as contrast therapy or contrast bathing. Research has shown that alternating hot and cold exposure causes fluctuations in blood flow and may help reduce pain, swelling and muscle stiffness.
A large proportion of the patients we see in clinic are in the acute phase of injury. This may be after lifting something awkwardly, sporting injuries, gardening, falls, flare ups of longstanding conditions or sudden muscular spasms. During this early inflammatory stage, techniques that help regulate inflammation can be extremely valuable. Reducing excessive swelling and irritation can help patients move more comfortably, tolerate rehabilitation exercises better and recover function more effectively in the early stages of healing.
This is one reason why we often discuss home management strategies alongside hands on treatment in clinic. What a patient does between appointments can significantly influence how comfortable they feel during the acute phase of recovery.
That said, it is important to be realistic about the evidence. While the vasodilation and vasoconstriction theory is widely accepted clinically, some researchers have questioned whether the “pumping action” is as dramatic as once thought deep within muscle tissues.
What we do know is that many patients report symptom relief from this approach, particularly in persistent inflammatory conditions, overworked joints and muscular flare ups. Clinically, I often find it useful where there is stiffness combined with irritation. The heat helps tissues relax and improves mobility, while the cold helps calm excessive irritation and swelling.
A simple example of how I may advise this at home is:
• Ice for 10 minutes
• Rest or heat for 10 minutes
• Repeat 2 to 3 times
Always ensure the ice is wrapped and never placed directly onto the skin.
It is also important to remember that heat is not always appropriate immediately after a fresh injury. In the first 48 to 72 hours after an acute sprain or strain, excessive heat may aggravate swelling.
Further Reading
• Bleakley CM, Davison GW. What is the biochemical and physiological rationale for using cold-water immersion in sports recovery? A systematic review. British Journal of Sports Medicine.
• Hing WA, White SG, Bouaaphone A, Lee P. Contrast therapy — a systematic review. Physical Therapy in Sport.
• National Library of Medicine: Review article on contrast water therapy and recovery strategies.
• Medical News Today: Heat and cold therapy overview for inflammation and injury management.
• Healthline: Contrast bath therapy and circulation responses.
• Cleveland Clinic: Cold therapy and heat therapy guidance for musculoskeletal injuries.