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Dear Dr. Roach: I get horrible fever blisters when I go on any tropical vacation and am exposed to lasting sun. These blisters develop on my lower lip. I have tried sunscreen, but nothing has worked.

Dear Dr. Roach: I am 69 and take medications for blood pressure and cholesterol, as well as plenty of vitamins. I have had many medical conditions (e.g., Meniere’s disease and lower back pain) that eventually were resolved.

Dear Dr. Roach: I received the first dose of Shingrix this week and had pretty severe side- effects, though in the range of what can be expected: high fever (101.5), intense shivering, a severe headache and 12 hours of extreme fatigue.

My recent negative column about injection sites in prison and elsewhere triggered a rapid response.

Dear Dr. Roach: I have been taking a multivitamin for years, and now one of my physicians wants me to take a vitamin that has no vitamin D or calcium. He just removed kidney stones in two separate procedures. I can’t find any vitamins like that. D.A.

Dear Dr. Roach: I recently was diagnosed with kidney cancer, and my wife is now getting treatment for breast cancer. Would cooking on a nonstick skillet have caused the cancers? My wife was using one for quite some time, but not anymore. B.R.

Dear Dr. Roach: I am 62 years of age and in excellent health. I run or hike three or more miles on most days, road bike, swim and weight train. I eat sensibly, and I don’t drink, smoke or take drugs.

Dear Dr. Roach: I am a 61-year-old woman in fairly good health except that I have been taking prescription omeprazole once a day for heartburn for at least 10 years, if not more.

Dear Dr. Roach: I got a call from my internist that my blood test showed an elevated uric acid and I would need to start allopurinol for gout. I had been having big-toe pain at night.

What’s a man to do? Equally important, what’s a doctor to advise when the PSA test is reported elevated? Or should men even be screened for this test? During the past 10 years, there has been considerable flip-lopping about it.