Can heat make back pain worse?

If it is an old chronic back ache, then heat works beautifully to relax the stiff muscles. But if you fell down or lifted something heavy just now, heat will increase the internal swelling. Simple rule is to use ice pack for new pain and warm bottle for old, lingering aches.

I made the mistake of putting a hot water bag on a severe backache which turned out to be a herniated disc infection. The heat made the inflammation so much worse that I could barely stand up the next day. Please don't keep self-treating with heat if the pain is severe or shooting down your legs; see a doctor immediately.

Yes, absolutely. If there is acute inflammation or a fresh injury, heat will aggravate it, so ice is better initially.

Before you spend thousands on MRI scans and specialist consultations, just observe the pain. If heat makes it worse, stop using it immediately and try a simple ice pack wrapped in a cloth. If the pain doesn't subside in 3-4 days, then it's better to budget for a proper doctor's visit to get a correct diagnosis.

It definitely can if we are talking about acute inflammation. My fitness coach always says to look at the source of pain—heat dilates blood vessels, which is great for muscle tightness but terrible for sudden joint or nerve inflammation. Try tracking when the pain flares up to see if cold therapy suits you better.