The purpose of this study was to examine the process of seeking medical treatment experienced by patients when they first discovered that they had cancer. The experience included visiting doctors and receiving treatment. The study employed qualitative research through in-depth interviews. A total of 35 patients who were newly diagnosed with breast cancer and were hospitalized in a medical center in Southern Taiwan were included in the study. One-on-one were conducted using a semi-structured interview guide. Each interview lasted for approximately 40 to 60 minutes. The interview content was transcribed verbatim immediately after each interview. NVivo9 computer software was then used to analyze, classify, and name the obtained data. The medical treatment process for initial breast cancer was divided into four stages. 1. Disbelief:＂ fear and unrest,＂＂ regret,＂ and＂ rejection.＂ 2. Conflict:＂variables of uncertain changes in the disease,＂＂ fear of receiving treatment,＂ and ＂abnormal physical condition.＂ 3. Overcoming a dilemma:＂ medical treatment is guarding me,＂ ＂family support and companionship,＂ and ＂media information.＂ 4. Regaining life quality:＂courage to face reality＂ and ＂accepting the fact.＂ By analyzing the results of the medical treatment for patients who were newly diagnosed with breast cancer, the data may assist clinical nurses in helping such patients to adapt physically and psychologically and to accept their disease and receive treatment as soon as possible. Nurses can further provide the care that the patients require, thereby promoting the stability of the disease and the patients' return to a regular life.