A clinic visit is short. In that short time, you have to convey the last two or three months, but what memory hands you back is not a summary of that stretch — it’s a handful of scenes.
The figure above shows a single dose coming and going. It carries four pieces of information — when you took it, when it started to rise, how high it went, and when it came back down. A day later, three of those times are usually the first to go, and all that’s left is “today was okay.”
Keeping a record is about holding on to those four things. It isn’t a big undertaking — just one tap when you take the dose, and one tap when you feel a change.