The base of thumb arthritis is a very common arthritis and is often observed in women. Since the most important finger of the hand is the thumb, a severe functional loss is observed in patients. Lifestyle changes, anti-inflammatory drugs, splints, and injections are preferred for initial treatments. In patients who do not benefit from these conservative treatments, arthroscopic and arthroscopy-assisted procedures can be conducted. Arthroscopic debridement, synovectomy, and thermal shrinkage can be performed in early-stage arthritis. Depending on the cartilage damage and narrowing that develops in more advanced stages, hemitrapeziectomy can be performed. Instability and loss of strength may occur after hemitrapeziectomy. In order to prevent this, stability can be increased with suspensionplasty and interposition arthroplasty. The learning curve of thumb arthroscopy is long and complications such as vascular-nerve-tendon injuries may develop. However, since it is a minimally invasive surgical method, it has its own advantages.