I've provided my Red Skin Fix as a free download which you can install into Lightroom for your own use. This brush preset will help you improve the color of skin that is red from sunburn or overheating.
If you prefer,you can use the setting shown here as a starting point for your own red skin fix preset. Note that these settings are just a starting point and you may need to tweak the adjustment according to the skin tone and degree of redness in your specific image. If you decide to copy the adjustments to make your own preset instead of downloading the file, don't miss the slight green color tint, as it is the most important part of this adjustment brush.