I have had some clients say that they have been advised to be careful as they are more sensitive to sun after and during chemotherapy treatment. Chemotherapy kills cancer cells and normal cells.
We have designed our Kelly bakerboy hats to help with this by including a brim to provide some protection to the face. The bakerboy hats are in soft cottons but they do not contain spf protection. You can buy some specialist clothing which contains high spf protection if you search for this, using terms such as lupus will help.
Cancer Research UK's cancerhelp site has information on taking care in the sun and includes suggestion that you wear a hat that shades neck and face.
Another alternative from the jashcroft range of scarves and hats is to wear the Tyara beanie cap under a wide brimmed sun hat. You can buy a variety of cheap sun hats on the high street, without a cap they would be harsh on the skin but combining the two can create the protection you need.