Should I take time off for ''redness'' to settle?

Most causes of skin redness are benign and self-limiting, as I've mentioned. So unless it's compromising day-to-day activities in any form or you're unwell in any way, do not require time off work. A lot of the features of redness depend on the aggravating factor so if there is an occupational aggravating factor then this might need to be considered or occupational changes may need to be made so as to prevent the redness from progressing and worsening further.