**
Since you have to attend an event tomorrow, so likely
home remedies to help with those red patches is/are:
1. If
redness is associated, use of ice pack [make sure it is clothed] to the area will reduce the discomfort
2.
Massage some tea tree oil, which helps reducing inflammation, and the easing of pain, and is perfect for taking the discomfort out of waxing.
3. apply
calamine lotion, which cool and soothes the skin.
4. Avoid hot water bath tomorrow,as HOT tends to irritate the skin.
5. In Ayurveda rubbing of
aloe vera gel is the most common way to reduce redness.
6. You may use over the counter antacids:which block production of histaminw and thus reduce redness/itchiness
PS. If Redness persists, after attending the event, make sure to visit your Doctor or Dermatologist