What is it? Appears as a typical tension-like headache, but can be difficult to diagnose, when the cause is taking too much pain relief.
How long does it last? If you keep taking meds to nip it in the bud, you can actually cause a bit of a never ending cycle.
What causes it? This one's caused just by the over-use of those friendly pain killers.
Treatments? Treatment can vary, so it's best to discuss this one with your doctor.