14 January 2026
Morning erections as a signal worth tracking
A nocturnal erection is not a mood. During REM sleep the sympathetic brake eases, nitric-oxide signalling has a quieter night to work, and blood fills the corpora. Most men have several of these events a night whether they remember them or not. The one you notice on waking is a leftover. When that leftover becomes rare over months, it is often a vascular, sleep or hormonal clue arriving before a failed attempt with a partner. It is also one of the few clues that is not distorted by performance anxiety in the room, which is why we ask about it in the first fifteen minutes.
What “tracking” actually means
For two weeks, on waking, write a 0, 1 or 2. Zero is no fullness. One is some fullness that would not allow penetration. Two is a rigid erection. Do this before you check a phone. Do not add a comment about shame. The sheet is a frequency count, like a cuff log. A man who records 2 on five mornings and 0 on nine is describing a pattern; a man who says “my mornings are gone” may be describing the same two weeks or a different year. We would like the two weeks.
Shift workers should pick a “biological morning”: the first waking after the longest sleep, even if the clock says 16:00. Alcohol nights should be marked with an A, because a 0 after 5 drinks is a different data point from a 0 after 6.5 hours of clean sleep. If you wake to urinate at 03:00 and notice an erection then, that counts for that wake-up; you can still score the later morning separately.
How to read a thin sheet without panicking
A week of zeros after a viral illness, a red-eye flight, or a new night shift is noise. Three months of zeros while partnered erections are also thinning is a signal. Morning erections that remain intact while partnered erections fail often point toward anxiety and pelvic-floor guarding rather than a purely arterial problem. That split is one of the most useful things the 90-minute visit can find, and it changes the program: coaching and pelvic-floor work move up, devices move down.
Medicines matter. Some antidepressants, some blood-pressure tablets, 5-alpha-reductase inhibitors and a long list of others can flatten nocturnal erections. Do not stop a prescribed medicine because a blog post listed it. Bring the list to your physician and to the assessment. Testosterone that is truly low can also thin mornings; a single afternoon blood draw is a poor way to decide that, which is why we talk about a morning sample with your doctor rather than guessing from energy alone.
What we do with the log in clinic
The two-week sheet becomes a baseline next to IIEF-5. At week 8 we ask for another two weeks. If sleep and pressure have improved and mornings have not moved at all, that is useful negative information: we look again at medicines, at the pelvic floor, and at whether a urology referral is now the honest step. If mornings have returned while partnered sex is still difficult, we have a clearer anxiety target. Either way the leftover erection on waking has done a job that a slogan could not.
General information. Talk to your physician before changing medication.