By Dr Thomas Jacotine, Osteopath – 24 October 2025
Many of us reach for a heat pack when we’re sore or tight, but have you ever wondered why heat feels so good, or when it’s actually the right thing to use? Heat therapy can be a simple and effective way to help manage pain, stiffness and recovery, but timing and application are key.
What does heat do
Applying heat to the body increases blood flow to the area, which can relax tight muscles, reduce joint stiffness and promote healing. The warmth also helps calm the nervous system, which can ease pain and discomfort.
In short, heat helps your body loosen up, move better, and feel more comfortable.
When to use heat
Heat can be really helpful for:
- Muscle tension or stiffness (for example, neck and shoulder tightness from sitting at a desk)
- Chronic or long term pain such as lower back aches
- Before activity, exercise or sport, to warm the muscles up and reduce the risk of strain
- Arthritis, to ease joint stiffness and pain
- Menstrual cramps or general muscle soreness
Common ways to apply heat include:
- A warm wheat bag or heat pack
- A warm bath or shower
- A heated gel wrap or hot water bottle
Apply for around 15 to 20 minutes at a time, checking the temperature so it’s comfortably warm, not hot enough to burn the skin.
When not to use heat
Heat isn’t right for every situation. You should avoid heat if:
- The area is acutely swollen, bruised or inflamed (such as straight after a sprain or injury)
- There’s visible redness, warmth or throbbing
- You have reduced sensation or poor circulation, as this can make it hard to judge how hot the area is and increase the risk of burns
- It’s being used by someone who is elderly, very young, or has cognitive impairment, as they may not feel excessive heat and are at a higher risk of burning themselves.
- You’re treating a fresh injury, where ice or gentle compression is usually better in the early phase
Using heat too soon after an injury can increase swelling or bleeding under the skin.
Unsure if heat is right for you
Heat therapy can be a great way to ease pain and improve mobility when used at the right time. If you’re unsure whether heat, ice or a combination of both is best for your situation, the osteopaths at Blackburn Allied Health Group can assess your injury, discuss your symptoms and help you find the safest and most effective approach for your recovery.
