It is good that the scar has improved with the use of the triple lightening agent...But continued use of this cream is not recommended..It should not be used more than 2-3 months at a stretch..moreover, it has to be applied only at night ,,and very little amount has to be used Excessive rubbing of this agent into the skin can also cause redness
Now since you are developing redness due to the cream, i would recommend that you stop using this agent now,,,instead,for the scar now you can use a mild lightening agent containing kojic acid
and Vitamin C
cream over the scar....
Also use a sunscreen(spf >26) regularly before going out in the sun..
Hope it helps
Dr Geetika Paul