I am a healthy, fit 20 yea old girl. I exercise regularily and eat properly.. Yesterday i felt sick to my stomach , have been tired for about 2 weeks now, was very light headed- almost felt like a light head ache. I passed it off and continued to work. When i went home, i ate some lunch and felt a bit better. Right after that i noticed i had a medium sized bruise on my right lower back- right where that dimple is. It was in a lot of pain. This morning i wake up, i do not feel tired, light headed or sick and that bruise is gone!.. Was it all a coincidence?
Hi welcome to Chat Doctor. Forum.  Thanks for choosing Chat Doctor forum.  It appears that you had a viral fever, and the symptoms. Hence, you had weak less, light-headed less etc. The bruising on the right lower back could be an urticaria due to the fever. As the time passes it has gone.  If at all you get any of the symptoms recurred you consult a physician for diagnosis and treatment.  At present there is nothing to worry about.  Best regards.