<s>[INST] Yesterday, I woke up as if I had slept wrong on my neck, it ached throughout the day and this morning I woke up and when I looked in the mirror I had a inch long, red, swollen spot on the right side of my neck.  It doesnt itch, it doesnt hurt, it just looks bad and Im curious as to what it may be? [/INST] Hello dear, welcome to Chat Doctor forum. From your description, it seems like an insect bite reaction on your neck(though you may not have noticed the bite). It can cause sever aching in around the site, with itching sometimes. It needs administration of antihistamines, along with simple analgesics. Also, you have to take a tetanus toxic injection if you had not one recently. I hope you will find this information useful. Thank you. </s>