Introduction Psoriasis is a common skin disease, with chronic inflammation and a complex etiology. It has long been recognized that chronic skin conditions and mental health disorders are often co-morbid. Thus, the concept of the gut–brain–skin axis emphasized in mental health disorders may also regulate the health of skin. Results The gut microbiota has been found to be the bridge between the immune system and nervous system. By leveraging clinical cases and animal models of psoriasis, an important communication pathway has been identified along the gut–brain–skin axis that is associated with the modulation of neurotransmitters from the microbiota. Furthermore, mammalian neurotransmitters, including dopamine, serotonin, or γ-aminobutyric acid (GABA), can be produced and/or consumed by several types of bacteria. Other studies suggest that manipulating these neurotransmitters by bacteria may have an effect on host physiology, and the levels of neurotransmitter can be altered by microbiota-based interventions. Conclusions Nonetheless, it is unknown whether or not the manipulation of neurotransmitter levels by bacteria can affect the occurrence and development of psoriasis. Notably, preliminary experiments found that oral consumption of probiotics improves the clinical symptoms in patients with psoriasis, perhaps correlated with the gut microbiome-mediated crosstalk between the immune system and the nervous system by secreting neurotransmitters in psoriasis. In this review, the communication along the gut–brain–skin axis is discussed.

greater proportion of melanomas (11.2% of total melanomas) were diagnosed at the free clinics compared with BCCs (4.8%) and SCCs (3.2%) diagnosed at free clinics (P < 0.001). NNS at the free screenings was 19 (BCC), 36 (SCC), and 56 (MM).The most successful advertising methods were as follows: radio (32.7%), newspaper (29.2%), and friend (10.9%) (Table 2). Radio, friend, and electronic communications (Email, Facebook/Twitter) were more popular advertising methods for patients ≤65 years, whereas newspaper and television were the more popular methods for patients >65 years (P < 0.05).