I have woke up this morning with itchiness and burning on my bum cheek, when I’ve touched it I’ve realised it’s extremely swollen, it’s at the crease of my left cheek right on the inside crease leading towards the vagina, I’ve examined no bite marks or nothing and do not understand what it could be, it feels like a heat rash and when I touch it it leaves a white mark for about 5 seconds, it feels very tender and by looking at my bum you can see how much it has swollen, it’s very uncomfortable and I cannot find anyone with a similar experience