Dear Dr. Roach: I thought you could help with a stubborn problem. I am a healthy and active 78-year-old woman who, I admit, likes to look younger than my age. The problem is my skin, especially on my hands and arms; I get these bruises that look unsightly and take a while to resolve. I hear it is from age-related thin skin. My friends of this generation also complain about these red spots or bruises. They don’t hurt.

Could I take vitamin K or increase my platelets so as to limit their happening? I’ve read not to take aspirin or any pain reliever. Is there any medicine to take to help my blood coagulate better or make my skin thicker?

— S.M.

Answer: This common problem is called solar purpura, and it is largely the sun causing the damage to the skin, thinning it with age. Avoiding the sun and moisturizing your skin diligently can reduce the risk of this happening. Once it’s happened, these measures are still important for preventing it from getting worse.

You should still avoid the sun and moisturize to prevent the condition from worsening. One study showed that bioflavinoid supplements helped reduce new bruises. These aren’t particularly expensive, but you can also get them through food, specifically citrus and other fruits.

Vitamin K deficiency causes clotting problems, but taking more vitamin K doesn’t help. Aspirin does reduce the effectiveness of platelets, but if you are prescribed it (for blockages in the heart, for example), you should definitely keep taking it. Occasional ibuprofen has little effect on platelets, and acetaminophen (Tylenol) has none.

Dear Dr. Roach: For years, I have been plagued by a chronic nasal drip. It’s usually most present in the mornings, though it seems to be intermittent during the day. I frequently have to wipe or blow my nose. I thought it might be due to allergies, so I have been taking a Zyrtec tablet every morning. But it doesn’t seem to have any effect.

I talked with my primary care physician about this, but he didn’t have any recommendations. I don’t know what is going on or how to stop this. Do you have any recommendations?

— R.M.

Answer: An antihistamine like Zyrtec is a reasonable thing to try as allergic rhinitis often responds to antihistamines. (We just love our Latin and Greek names, and “rhinitis” comes from the Greek roots for “inflammation of the nose.”) Since an antihistamine didn’t work, it seems likely that you might have nonallergic rhinitis, and a nasal spray like ipratropium is usually effective for this.

I also recommend azelastine nasal spray, which is now available over the counter as “Astepro.” There are some steps you can do to help your environmental risk, such as reducing dust and avoiding excess dryness.

I warn people against the habitual use of nasal decongestants like Afrin, which should only be used for a day or two — never more than three. Once the body gets used to it, nasal congestion will worsen every time a person tries to go without it.

If the nasal spray doesn’t do the job, I’d recommend an evaluation by an expert, such as an otorhinolaryngologist, who may need to look for nasal polyps, laryngopharyngeal reflux, and other less-common causes.

Contact Dr. Roach at ToYourGoodHealth@med.cornell.edu.