Chemical sunscreens have been noted to cause irritation and in rare cases even allergies, including (ironically) photoallergy, or skin sensitivity in the presence of sun.
When trying a new sunscreen and you particularly have sensitive skin, it is recommended to do a patch test on your inner arm and leave it for 24 hours to see if there are any reaction.
Reflective sunscreens with nanoparticles are generally considered safer for the skin, body, and environment than chemical sunscreens. They are often recommended for sensitive skins, as the potential for reactions are less.
In addition, manufacturers can coat the nanoparticles, so they don’t react to form potentially hazardous free radicals.
Certainly, the benefits of zinc oxide and titanium dioxide outweigh known risks.