I have a bump on the back of my head and it hurts to the touch came out of no where should I go to the emergency room

Are you experiencing any other symptoms? Nausea, dizziness, light headed-ness? Are you reacting differently to light than normal? Is the bump bleeding? Do you have a headache, and if so, does it worsen when pressure is applied to the bump? If so, I would see a doctor. If not, maybe an Urgent Care visit or a call to your regular practitioner? Either way, if you're concerned I would have it looked at.

Are you experiencing any other symptoms? Nausea, dizziness, light headed-ness? Are you reacting differently to light than normal? Is the bump bleeding? Do you have a headache, and if so, does it worsen when pressure is applied to the bump? If so, I would see a doctor. If not, maybe an Urgent Care visit or a call to your regular practitioner? Either way, if you're concerned I would have it looked at.
Yes it hurts more when I lay on it or touch it and been having headaches for A week no nausea or dizzy ness