The claim, Apple Watch is causing skin rashes and burn marks is true. An article from The Times explains how thousands of people are reporting rashes on their skin. "Customers have complained on Apple’s website about the issue and the company’s handling of complaints. Many posted pictures of their injuries, which ranged from areas of red skin to seeping blisters. Lots of the reports on Apple’s community forums have common themes — circular burns that apparently appeared at random."
One customer wrote: “I’ve had my watch for over two years and have only recently started getting burn marks on my arm from wearing it.” Another said: “This happened to me too for the first time last night! I’ve been wearing my watch for almost three years now. I woke up when it happened and felt that my watch was very hot. My skin turned leathery over the reddened part.”
Another who reported wearing an Apple Watch “for years without an issue” before a painful red mark appeared said he was “surprised by how widespread this issue appears to be and Apple’s apparent lack of support and concern”. Some who complained said they did not believe the marks were an allergic reaction and claimed doctors had confirmed they were burns. These direct reports from this article explains how Apple Watches are causing burns, especially overnight while people sleep. More than one person has complained about the same issues happening to them. Even doctors have confirmed that the marks from their watch are burns.
https://www.thetimes.com/uk/article/apple-watch-wearers-report-burn-marks-and-blisters-j0cwj6wcl
In addition, Boston News also reveals reports from 18 people about the burn marks on their Apple Watch. The article states, "A search of Consumer Product Safety Commission records uncovered 18 complaints like Bracey’s. People claimed their Apple Watch caused 'burns and parts of skin to peel away,' a 'circular red patch,' 'severe skin redness,' an 'itchy, dry rash,' 'skin irritation,' 'burning”and blisters."
"Apple’s company website lists the materials in its watches and bands. It doesn’t mention anything about burns, but it does mention potential skin sensitivities and that a 'small number' of people may experience reactions to certain materials, which the company says could be due to allergies, environmental factors, or extended exposure to irritants like soap or sweat."
"Dr. Steven Feldman is a dermatologist with Atrium Health Wake Forest Baptist in Winston-Salem. He said one of his patients had a skin rash following use of an Apple Watch.”
"He and a medical student wrote a paper about it. They pointed out that many watches, including Apple, contain nickel, which 'is associated with allergic' reactions. Customers may wear smartwatches tighter due to the presence of heart rate sensors. The watch bands are 'more likely to be made of synthetic polymers' with more friction.” This article also states how many people have experienced the same thing with Apple Watch rashes. The materials of a watch include nickel and synthetic polymers, which can cause rashes.
https://www.boston25news.com/news/local/customers-claim-apple-watch-caused-skin-irritation-injuries/POB2SCNLUJEXXNESRM3N472Q6Q/
To counter those arguments, an article from The Epoch Times, expresses, Jargen Mouritzen, a user from Denmark, says he was left with severe burns after the strap surged with power and started burning his flesh.
“I could smell the burning flesh. And the strap was so hot that as I scrambled to try and pull it off my arm, I even burnt my fingers.”
"According to Apple, A small number of people will experience reactions to certain materials. This can be due to allergies, environmental factors, extended exposure to irritants like soap or sweat, and other causes, it said."
"The company also warns that some of the watch straps contain Nickel, which can cause reactions but since the quantity falls below strict European regulation, nickel exposure is unlikely to be a problem." This source reveals more people that have had issues with an Apple Watch rash. Even though Apple says nickel exposure is not a problem, the exposure is affecting many people that own Apple Watches. This exposure is affecting more people, most likely not due to environmental issues, but due to the material of the watch.
https://www.theepochtimes.com/article/apple-watch-users-complain-after-device-causes-rashes-and-burns-1906846?welcomeuser=1
In addition, an article from ABC 13, Dr. Adam Friedman states, "The moisture itself can cause irritation, but it's probably sweat, Sweat is also comprised of salt, and the reason people can get these kind of of itchy rashes is, as the sweat dries, it deposits salt on the skin."
"As that salt dries and your Apple Watch band rubs against it, it can cause a rash in some cases."
According to Apple, "The site notes that a small number of people will experience reactions to certain metals like nickel and methcrylate." Dr. Friedman goes against what other articles said before by saying the sweat content is the main reason why rashes happen, but he still says that the watches cause a rash. Even Apple changed their website to state that metals like nickel and methacrylate can cause rashes or burns. The materials combined with the sweat from someone is enough to cause of rash or burn.
https://abc13.com/post/heres-how-the-new-apple-watch-can-cause-a-rash/702162/
To conclude, an article from International Business Times, reveals, "Apple knew that a certain percentage of Apple Watch wearers would develop skin irritations. Earlier this year, the company hired a dermal toxicologist, who will likely study the long-term (as in more than two weeks) effects and safety concerns of wearing the watch. If skin issues become a long-running problem, it could seriously hamper sales of the Apple product -- which is why the company has proactively addressed them." This article states how Apple knew about the burn/rash problems with the watch and were actively trying to fix the problem. This source further proves the watches cause rashes/burns by stating how Apple knew that their product would affect people.
https://www.ibtimes.com/yes-your-apple-watch-giving-you-rash-heres-what-do-about-it-1909867