Is there a definite connection between excessive masturbation and neurasthenia?
Generally speaking, there is no necessary connection between excessive masturbation and neurasthenia. The detailed explanation is as follows:

An increased frequency of masturbation is merely a natural outlet for sexual tension. Ejaculation does not disrupt the basal levels of neurotransmitters. Symptoms such as dizziness, insomnia, and memory problems—often described as neurasthenia-like discomfort—are mostly caused by negative self-evaluation and persistent anxiety about the behavior. The brain releases excessive stress hormones due to anticipated fear, leading to palpitations and fatigue. Once moral overload is removed, the body can naturally restore homeostasis. Therefore, there is no inevitable causal relationship between the two.
In daily life, try turning off blue light from screens two hours earlier in the evening, and instead use warm foot baths and reading physical books to calm the sympathetic nervous system. Upon waking, open the window to get natural sunlight, followed by 20 squats to naturally boost dopamine through physical activity. In the afternoon, take a walk or share lunch with a friend, filling free time with social interaction to reduce solitary sexual urges. If feelings of emptiness persist, write down small goals for the day and give yourself credit each time you complete one. After several weeks of consistency, new reward pathways will replace the fleeting comfort once provided by nighttime self-stimulation.