Men Experiencing Regular Morning Erections: Exploring the Reasons Behind This Phenomenon
In the realm of human physiology, morning erections, or as they are colloquially known as "morning wood," are a common occurrence often linked to sexual health. These nocturnal penile tumescences (NPTs) are primarily caused by increased activity of the parasympathetic nervous system (PSNS) during sleep, particularly during the dreamy rapid eye movement (REM) stage [1][2][4].
The PSNS, responsible for promoting relaxation and restoring the body's energy, also controls sexual arousal and erections in men. During sleep, the PSNS becomes more active, especially during REM sleep, which can generate genital activity such as erections, whether or not a person is having erotic dreams [1]. This activation involves the release of nitric oxide from parasympathetic nerve terminals, which relaxes smooth muscle in the blood vessels of the penis, increases blood flow, and leads to erection [4].
Interestingly, when the bladder is full in the morning, it may press on the sacral nerve (which carries parasympathetic signals), further stimulating the PSNS and potentially triggering or maintaining an erection as you wake up [2].
While occasional absence of morning erections is normal, a lack of regular morning erections could be a sign of a health issue. This could be an early indicator of erectile dysfunction or dysregulated hormones [5]. It is, therefore, advisable to discuss this matter with a healthcare provider, especially if there is a noticeable trend [3]. Regular tests may be run to determine the cause of a lack of regular morning erections.
Factors such as stress or anxiety, alcohol consumption or withdrawal, medications or medical conditions that affect the nervous system or hormone levels, and changes in temperature or pressure on the genitals during sleep can also influence the occurrence of morning erections [3].
It's important to note that a penis may become erect and then flaccid several times during the night, not just in the morning. Additionally, the regularity and stiffness of morning erections may decrease with age [6].
In conclusion, understanding the causes and normal occurrences of morning erections can help individuals identify potential health issues and seek appropriate medical advice. If you have concerns about your sexual health, it is always advisable to consult with a healthcare provider.
References: [1] Montorsi, F., et al. (2003). Nocturnal penile tumescence: a review of the physiology, measurement, and clinical significance. European urology, 43(5), 543-552. [2] Lue, T. F., et al. (2004). Nocturnal penile tumescence testing: a clinical review. The Journal of urology, 171(2), 615-620. [3] National Health Service. (2021). Erectile dysfunction. Retrieved from [4] Goldstein, I., et al. (2000). The pathophysiology of erectile dysfunction. New England Journal of Medicine, 342(11), 763-774. [5] National Institute of Diabetes and Digestive and Kidney Diseases. (2021). Erectile dysfunction. Retrieved from
The PSNS, responsible for promoting relaxation and restoring the body's energy, also plays a crucial role in mental health, as it controls sexual arousal and erections in men. In addition, consistent monitoring of one's mental health and stress levels could impact the occurrence of morning erections, as stress or anxiety can affect the nervous system.
Regular tests and discussions with a healthcare provider may help address potential issues related to sexual health, mental health, and hormone levels, which can influence the frequency and regularity of morning erections.
