On 10-jun-2022, a spontaneous report from the united states was received via telephone from a 59-year-old female who used a thermacare lower back and hip 8hr l/xl heat wrap.Allergies included allergies to wasps and aleve (naproxen).Medical history included prior use of thermacare without issue.Concomitant products included a multivitamin.On approximately (b)(6) 2022, the consumer topically applied a thermacare lower back and hip 8hr l/xl heat wrap to the lumbar region of her back prior to work.After work and when she removed the wrap, she found she had developed blisters at her waistband.She was a nurse and treated the abrasions with antibiotic cream and covered them with a band-aid.A week later, the blisters erupted, and she had "holes" in her back where the blisters used to be.She was not able to sleep on her back due to the discomfort of the area.She denied wearing the product for more than 8 hours and noted that she did not need to wear clothing between her skin and the wrap even though it was recommended for consumer above 55 years of age.On (b)(6) 2022, her health care practitioner looked at her back and was told it looked like a burn.For treatment, she was given a burn cream.As of (b)(6) 2022, the burn cream was helping, and she was doing much better.She still had a little of her burn and some discomfort.She realized that she should have put clothing between the product and her skin.She believed the directions are too small and felt that it would be helpful if the lettering was bigger and highlighted.No additional information was provided.
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The root cause cannot be identified.The site investigated this complaint by reviewing the device history records and manufacturing controls.The review of the device history records, batch thermal records, and production controls met the product release criteria.Consumer reports " she had developed blisters at her waistband".The cause of the consumer stating she developed blisters is inconclusive since review of records does not provide evidence to support defective product.The product effect may vary with each individual.Care should be taken when using the device, following all safety and use information as provided with the wrap to avoid the risks of blisters or other skin irritations.This is an adverse event for blisters; a risk calculation cannot be determined as there is no reasonable suggestion of a device malfunction.
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