After sunburn (photo-reaction) if the tanning is there means kojivit helps if redness & itching is present means it irritates the skin thats why you need to specify when you explaining the problem.
Thinking that now your having tanned out skin means.
Please use Golite cream morning & biluma cream in the night. As golite contains sunscreen spf 30 also prevents photo damage & tanning ,& biluma is pure skin lightening cream usually it wont irritate the skin.
Next Steps
If still your doubts are not clear, meet near by dermatologist & take an opinion.