Thanks for the query.
incision will be healed within one month after delivery.
So the red spot you are mentioning could be due to some infection or it can be something other than episiotomy wound like bartholin
duct opening etc.
So you once discuss clearly with your doctor regarding this and if needed go for swab for culture and sensitivity from the spot and take treatment accordingly.
You can take sitz bath that can give some relief and help in healing the wound.
For more details you can ask me through: http://www.healthcaremagic.com/doctors/dr-sree-gouri-sr/63429