Answer first
A thinning scalp has less natural shade, so strong Malaysian sun can burn it quickly and dry out the hair. Wear a hat or use an umbrella at midday, choose a scalp-friendly sunscreen spray on exposed partings, and rinse off sweat and sunscreen at the end of the day.
Why it matters
Sunburn makes the scalp red, sore and flaky, and repeated sun damage ages skin.
Protection
Hats with ventilation, umbrellas, shade at midday, and light, non-greasy sunscreen on bare areas.
After sun
Cool rinse, gentle shampoo, and a soothing leave-on if the scalp feels hot.
Questions
Do hats cause hair loss?
No, as long as they are clean and not very tight.
Which sunscreen for the scalp?
A light spray or gel made for hair and scalp is easiest to use.