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Dear Dr. Roach: I am a 77-year-old woman with spinal stenosis and have been treated by a pain-management doctor for several years. My pain is from my neck down to my lower back and radiates to my legs.

Dear Dr. Roach: Why do older people tend to get lightheaded (not vertigo) and therefore become liable to trip or fall? What causes that, and can anything be done? I鈥檓 an 83-year-old lady afraid to trip over the garden hose or her own feet. A.R.

Dear Dr. Roach: What is causing my hair to fall out? What can I do to stop it? I鈥檓 a 72-year-old woman. Could I be hypothyroid? L.O.I. By far, the most common cause of hair loss in women in their 70s is female pattern hair loss.

Dear Dr. Roach: More than a year ago my husband had surgery. A couple of days later he was diagnosed with a blood clot in his calf. They did blood testing on him, and one test came back positive for 鈥渙ne copy of the Factor V Leiden Variant.

Dear Dr. Roach: For over six decades, I have lived with smokers. My parents smoked around their children inside our family home and inside the family car. Later, most of my siblings smoked. Family gatherings were always smoky affairs.

Dear Dr. Roach: Your recent column on melanoma piqued my interest. My husband was exposed to Agent Orange in Vietnam in 1968. He had a melanoma on his neck removed with lymph nodes in 2007.

Dear Dr. Roach: I am a 55-year-old woman. I have always been in excellent health, but this year, my routine bloodwork showed that my creatinine is 1.08 (high) and that my GFR is 58 (low).

Dear Dr. Roach: I have been suffering for some time with jock itch. The resulting scratching leaves my groin area and thighs abraded and oftentimes bleeding.

Dear Dr. Roach: I am a man, 83, and my bladder leaks continuously since I had a hip replacement surgery. The surgeon used a catheter during the surgery, and when it was first removed, I could not urinate. I went home with a new Foley catheter.

Dear Dr. Roach: With all the masks, hand-washing, sanitizing and social distancing, will we all have weak immune systems when life goes back to normal? J.D.H. No.