Severe stomach pain
What severe stomach pain is, why it happens and what to do about it.
What is this?
This section will describe what severe stomach pain actually feels like, how it usually begins, and how to tell it apart from the milder effects listed above it. Written for someone reading while they are experiencing it, so it opens with recognition rather than mechanism.
Why is it happening?
This section will explain the mechanism in plain terms: what the medicine is doing that can produce this effect, and roughly when during a course of treatment it tends to appear.
What should I do?
This section will say what to do and in what order, and where the line sits between contacting the clinic, calling 111 and going straight to A&E. Safety-critical: this is the wording a reader is most likely to act on immediately, and the one paragraph here that cannot ship as an approximation.