Hi. i have a rash at the back of my neck on the hair line which gets inflamed and painful. also a ring like small rash on my back. also have a constant light headache and extremely tired. not sure if all are related. any ideas what it could be?

Poblems: The rashes you describe sounds like two different types of rashes. The circular rash sounds most like ring worm which is caused by a fungus. The rash on your hairline could be two possible issues. It could be a fungal infection too- hair loss in the area? Another possibility would be a folliculitis which would be a bactrial infection. The hair line infection is likely causing the headache.