Background Acute oligoarthritis is a common presenting complaint to secondary care, with acute septic arthritis as its most serious differential diagnosis, with potential to destroy joints. Arthrocentesis, with synovial fluid analysis, remains the goldstandard in differentiating between septic and non-septic causes. Prompt diagnosis of an acute hot joint remains fundamental in avoiding unnecessary antibiotic prescriptions and patients' length of stay. Currently in our local trust, cases of native joint oligoarthritis are referred to the rheumatology team within the hours of 9am-5pm from Monday-Friday, and managed by orthopaedics outside of these hours. Arthrocentesis was incorporated as part of the compulsory curriculum for core medical trainees (CMTs) from 2009 to 2018. Since the implementation of internal medicine training (IMT) in 2019 and the change to the updated curriculum, this requirement has been removed.3 This has resulted in trainees often progressing to IMT3 level and above without having ever performed or even observed an arthrocentesis, and yet be expected to run the acute unselected medical take with remote consultant supervision as part of their required ARCP outcome for satisfactory progression. Methods We developed a practical teaching session on managing the acute hot joint presentation in our local trust. It was delivered with help of one of the consultant rheumatologists as well as the local postgraduate education centre providing appropriate hot joint models and kits. A model of the knee was used to simulate the commonest site and the session was advertised to all members of the MDT who are frequently involved in delivering care to patients seen on the acute unselected medical take. Results We aimed to upskill and increase the confidence of the wider members of the multidisciplinary team (MDT) who frequently come across this acute presentation. The audience included advanced nurse practitioners, physician associates, trust grade as well as a range of trainee doctors. Pre-session, 37% of participants described themselves as 'not at all confident;' in managing an acute knee arthrocentesis; one person described themselves as 'quite confident'. The rest were equally split between 'a little confident' (2) and 'somewhat confident' (2). Post-session, there was a 50% increase in the audience's confidence in managing an acute knee arthrocentesis, with five people describing themselves as 'quite confident'. There was only one person who continued to say they were 'a little confident' post session. The remaining two described themselves as 'somewhat confident'. No one said they were 'not at all confident' in their post-session survey responses. Most of our attendees (87%) thought that arthrocentesis of the hot large joint should be a compulsory skill for their level of training. Conclusion With the recent changes in the shape of training leading to omission of certain skills such as arthrocentesis for IM trainees for satisfactory progression, we propose the need to educate the MDT frequently dealing with acute oligoartheritis as part of the unselected medical take with this crucial practical skill. We have demonstrated a cost-effective yet impactful practical teaching session to help achieve this goal. We believe that this session can be adapted by other trusts in which non-orthopaedic teams take responsibility for acute hot joints. [ABSTRACT FROM AUTHOR]