Hello and welcome to MedHelp's forums. Thanks for the question and sorry about the delay. The first thing to really do is to be properly diagnosed. Hormonal imbalance can cause a pigmentation change on the face that has a similar look so you want to make sure it is truly a malar rash. Here is some information on this type of skin condition associated with lupus. https://www.webmd.com/lupus/guide/how-lupus-affects-your-skin#1. For some, it does feel hot. It is of varying degrees in different people. It's treated with ointments or steroid shot and it is important to use a good sunscreen as the sun's rays make it worse. Are you having other issues that make you suspect this autoimmune disease? https://www.mayoclinic.org/diseases-conditions/lupus/symptoms-causes/syc-20365789. The rash in and of itself warrants a visit to your doctor. Let us know how you are doing.