This is Dr. David
Deep Heat contains Menthol 5.91% w/w, Eucalyptus Oil 1.97% w/w, Methyl Salicylate 12.80% w/w, Turpentine Oil 1.47% w/w.
these can irritate the skin and cause temporary burning sensation
but most likely will not cause long term damage.
let me know if you have other questions.
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