This means:
“Taking a shower every day after the age of 65 may have some negative effects on your skin or health, and the headline is going to explain why.”
Breakdown
“Why” = the headline promises an explanation.
“Daily showers” = showering every day.
“After 65” = referring specifically to people over 65.
“May do more harm than good” = suggests that daily showering could potentially cause more problems than benefits.
What is it suggesting?
The headline is likely referring to things such as dry or irritated skin, because aging skin generally becomes thinner and produces less natural oil. Frequent hot showers and harsh soaps can make dryness worse.
However, “daily showers may do more harm than good” is not a universal medical rule. Whether someone should shower daily depends on their skin, activity level, climate, hygiene needs, and personal preference.
A simpler version:
“Why showering every day might not be ideal for some people over 65.”
