Hi, I have a lump very hard lump on the back of my head recently. When it first appeared it caused itching on the lump and burning sensation then the next day I had extreme fever and rash like redness on my face then slowly this rash covered all of my body, I had fever for a week and it was extreme fever like 105, and rash covered all over my body but after a week fever dropped and slowly rash started to disappear now after almost 2 weeks of that I m having this lump on my head again on the left side back of my head again I m scared that I m gonna have this rash and extreme fever again