A31-year-old man who has worked for several years installing fiberglass insulation has developed itchy, irritating lesions on his wrists and forearms over the last several months. he has applied moisturizing creams repeatedly and has taken antihistamines but has experienced no significant improvement. he is understandably concerned about the potential effect this could have on his livelihood and has asked his health care provider when treatment will resolve the problem. what is the health care provider’s most appropriate response?