Most people know the basics: sprained ankles get ice, sore muscles get heat. Whether you’ve grabbed an ice pack after a twist or curled up with a heating pad for a backache, you’ve already felt how powerful temperature can be when it comes to pain relief. Heat and cold therapy—also called thermotherapy—can be a simple, affordable, and surprisingly effective way to ease pain, whether you’re dealing with a fresh injury or a chronic condition.[1]
Heat Therapy vs Cold Therapy: Which Works Better?
There’s no one-size-fits-all answer here. Heat and cold each have their strengths. Cold therapy (cryotherapy) helps calm inflammation, reduce swelling, and numb sharp pain. Heat therapy boosts circulation, loosens stiff muscles, and eases chronic aches and spasms.[2; 3]
Choosing the right one depends on what kind of pain you’re dealing with and what’s causing it.
When Should I Use an Ice Pack for Pain?
Cold therapy works by slowing blood flow to the affected area, which reduces inflammation and numbs the nerves, making it especially helpful for pain associated with swelling or redness. It’s great for:
- Recent injuries, like sprains, strains, or bruises [3]
- Swollen joints or inflamed tendons [4]
- Headaches or migraines (especially when placed on the forehead or neck) [5]
- Post-surgery swelling or nerve irritation [4; 1]
Remember: don’t apply ice directly to bare skin. Wrap an ice pack in a towel and use it in short bursts, typically 15–20 minutes at a time.
When Is Heat Best for Pain?
Heat can also mentally soothe you by relaxing your body and improving your mood.[5] Skip the heat when there’s active swelling or if you’ve recently injured the area. Heat therapy increases circulation and helps relax muscles and tissues, but shouldn’t be used within the first 48 hours of an injury.[2]. This makes it a go-to for:
- Chronic pain conditions, osteoarthritis or tendonitis [5]
- Muscle tension and spasms [1]
- Stiff joints or “cold” joints in the morning [5]
- Menstrual cramps or pelvic pain
- Pain flare-ups that feel tight, sore, or crampy [5; 6]
When Both Warm and Cool Compresses Work
Some conditions, such as fibromyalgia, rheumatoid arthritis, or back pain, respond well to either heat or cold.[7]
According to Pain UCSF and Science Direct, you can also alternate between your frozen bag of peas and your heating pad for some symptoms or conditions like:
- Osteoarthritis and rheumatoid arthritis flare-ups
- Recurring muscle pain or soreness
- Sports injuries during the recovery stages
- Chronic back or neck pain with intermittent swelling
Treatment Tip: Always start with cold if there’s any swelling. You can then switch to heat to relax the area once the inflammation calms down.
Does the Method of Thermotherapy Matter?
Yes, it can make a big difference in comfort and effectiveness. Moist heat (like steamed towels or warm baths) tends to penetrate deeper and may work better than dry heat (like electric heating pads) for muscle relaxation.[3; 8]
Common heat therapy options:
- Heating pads
- Warm compresses or towels
- Hot showers or baths
- Warm water hydrotherapy (especially for arthritis or fibromyalgia) [7]
- Sauna [1]
Cold therapy options:
- Ice packs, gel packs or a frozen bag of veggies
- Cold compresses
- Ice massage (with caution to avoid skin/tissue damage) [3]
- Joint ice bath (submerge just the affected joint in ice water) [6]
- Ice baths (popular in sports recovery, but not ideal for everyone, especially cardiovascular patients) [5]
- Cold topicals (like menthol gels) can also give a “cooling” effect, although they don’t reduce inflammation the way actual ice does.[7]
When to Use Heat or Cold Therapy for Chronic Pain
For chronic pain, both warm and cool compresses can be part of your regular routine. Thermotherapy offers an easy, at-home treatment for achy joints, sore muscles, or a bad back. The best part? No special equipment needed! Use ice packs to calm sudden flare-ups or swelling. Use a healing pad to loosen and ease muscle tension, or soothe ongoing aches.
Talk to your pain specialist about building heat and cold therapy into your long-term plan. While simple, these methods are backed by research and real-world evidence, and when used correctly, they can help you stay active, comfortable, and in control of your pain.[1; 4]
Pain management rule of thumb? Ice for inflammation and swelling. Heat for rightness or stiffness. And when in doubt? Ask your provider for the best option for your condition.
Resources:
- Wang Y, Lu H, Li S, et al. Effect of cold and heat therapies on pain relief in patients with delayed onset muscle soreness: A network meta-analysis. J Rehabil Med. 2022;54:jrm00258. Published 2022 Feb 8. doi:10.2340/jrm.v53.331. Accessed June 25, 2025. Available from: https://pmc.ncbi.nlm.nih.gov/articles/PMC8862647/
- Ice Packs vs. Warm Compresses For Pain. Johns Hopkins Medicine [Internet]. Accessed June 25, 2025. Available from: https://www.hopkinsmedicine.org/health/treatment-tests-and-therapies/ice-packs-vs-warm-compresses-for-pain
- Gotter A. Treating Pain with Heat and Cold. Healthline [Internet]. Updated May 26, 2023. Accessed June 25, 2025. Available from: https://www.healthline.com/health/chronic-pain/treating-pain-with-heat-and-cold
- US Pain Foundation. The Benefits of Heat and Cold Therapy for Chronic Pain. Published September 14, 2021. Accessed June 25, 2025. Available from: https://uspainfoundation.org/news/the-benefits-of-heat-and-cold-therapy-for-chronic-pain
- Brazier Y. Hot or cold: Which therapy works best? Medical News Today [Internet]. Published July 25, 2017. Accessed June 25, 2025. Available from: https://www.medicalnewstoday.com/articles/29108
- Using heat and cold for pain relief. Rheumatoid Arthritis (RA) support program – Arthritis Australia [Internet]. Published 2020. Accessed June 25, 2025. Available from: https://myra.org.au/article/managing-pain-heat-or-cold/using-heat-and-cold-pain-relief
- WebMD Editorial Contributors. When Should I Use Heat or Ice for Pain? WebMD [Internet]. Accessed June 25, 2025. Available from: https://www.webmd.com/pain-management/when-use-heat-ice
- Malanga GA, Yan N, Stark J. Mechanisms and efficacy of heat and cold therapies for musculoskeletal injury. Postgrad Med. 2015 Jan;127(1):57-65. doi: 10.1080/00325481.2015.992719. Epub 2014 Dec 15. PMID: 25526231. Accessed June 25, 2025. Available from: https://pubmed.ncbi.nlm.nih.gov/25526231/
