There have been several reported cases of severe acute respiratory syndrome (SARS-CoV-2) infection that were associated with an increased incidence of neurological manifestations, including Guillain–Barré syndrome (GBS). This review aims to present information on the reports of GBS associated with coronavirus disease 2019 (COVID-19) infection. Our review is retrospective work examining articles published from the 1 April 2020 to the 8 May 2021 in the English language. We used the diagnostic criteria and classification published by the National Institute of Neurological Disorders and Stroke and Brighton Collaboration. GBS is usually a postinfectious syndrome, but GBS in the COVID-19 pandemic also takes on a para-infectious profile. In the reports, the genetic factor has a role in developing GBS in some patients. In conclusion, the association between COVID-19 and GBS is not very clear. Still, one mechanism is strongly associated with COVID-19 and immune-mediated neurological complications, which is molecular mimicry between SARS-CoV-2 and human autoantigens.

Background The word “atopy” is frequently used to describe immunoglobulin E (IgE)-mediated diseases. The prevalence of atopic dermatitis, allergic rhinitis, and asthma is increasing and disconcerting in Saudi Arabia. This study aims to investigate the association between allergic rhinitis, atopic dermatitis, asthma, and oral health among adults in the Makkah region of Saudi Arabia. Methods A cross-sectional study of 726 adults using an electronic questionnaire was adopted. The study was carried out from January to December 2022. The questionnaire included demographic data, patients’ diseases in response to inclusion and exclusion criteria, oral health status and symptoms, and dental health-related behaviors. Results Most participants were aged from 18 to <40 years (79.1%). More than half of the participants were females (53.6%); 39.7% of participants had poor oral health. Poor health was significantly higher among obese subjects as well as those with lower levels of physical activity, higher perceived levels of stress, those who received a sealant, and those who brushed their teeth for ≤ one time per day. The results showed that the individual symptoms of oral health did not associate significantly with being diagnosed with allergic rhinitis or asthma in the past 12 months. However, atopic dermatitis was independently associated with a chipped or broken tooth (OR = 1.52) and pain in the tongue or inside the cheeks (OR = 3.57). Conclusion Poor oral health was significantly associated with atopic dermatitis in Saudi adults. Some systemic diseases are considered chronic diseases, and they are multifactorial; thus, we cannot claim that periodontal pathogens are the definite cause of systemic infections. More studies are necessary to find a definitive association.

Stevens-Johnson syndrome (SJS) typically involves a skin rash, mucositis, and conjunctivitis. Previous reports of SJS without skin manifestations affect children and are usually associated with Mycoplasma pneumoniae infection. We present a rare case of oral and ocular SJS without skin lesions in a healthy adult after exposure to azithromycin without mycoplasma pneumonia infection.

Isotretinoin, widely used for treating severe acne, has also been prescribed off-label for hidradenitis suppurativa (HS). While effective in some cases, isotretinoin is known to cause psychiatric side effects. This case report discusses a 24-year-old male with HS who developed severe nightmares after the isotretinoin dosage was increased. Initially prescribed to manage his HS symptoms, the drug led to vivid, distressing nightmares that significantly disrupted his sleep, resulting in the discontinuation of treatment. The symptoms resolved upon cessation of isotretinoin, and a probable association was confirmed using the Naranjo algorithm. The patient was later transitioned to adalimumab, a biologic therapy for HS. This case highlights the need for careful psychiatric monitoring during isotretinoin therapy and emphasizes the importance of considering alternative treatments in cases of intolerable side effects. Further research is necessary to better understand the psychiatric implications of isotretinoin, including sleep disturbances like nightmares.