Aim: This study aimed to explore the experiences of nurses who were diagnosed with coronavirus-19 and received treatment from their perspective. Background: Coronavirus-19 has caused many people to become sick and die. Nurses who struggle with coronavirus-19 in the forefront have been physically and psychologically influenced by the pandemic, and many nurses were diagnosed with coronavirus-19 and even died. Methods: A descriptive qualitative approach was used. The study was conducted with 18 nurses diagnosed with coronavirus-19, and the data were collected using a semi-structured individual interview form. The data were analysed with the thematic analysis technique using Meleis et al.’s mid-range theory on experiencing transitions. COREQ Checklist was followed as EQUATOR Checklist. Results: Nurses’ experiences when diagnosed with coronavirus-19 have been examined under 6 main themes as emotions experienced when finding out to be coronavirus-19 positive, the emotions during the quarantine process, posttraumatic growth, methods of coping with coronavirus-19, nursing care after coronavirus-19 treatment, and metaphors about coronavirus-19. Conclusion: The study revealed that nurses diagnosed with coronavirus-19 experienced fear, loneliness, frustration, depressed mood, exclusion, and fear of death. Besides, after coronavirus-19 treatment, they experience posttraumatic growth such as spiritual change, changes in the relationship with others, changes in priorities, and appreciation of the meaning of life. They cope with adverse situations caused by coronavirus-19 by getting social support, positive thinking, paying attention to nutrition, and engaging in domestic activities. Besides, they perform their nursing care after coronavirus-19 with more empathy and emphasizing the psychological aspect of care. Relevance to clinical practice Being diagnosed with coronavirus-19 has caused the nurses to be negatively affected psychologically (fear, depression, loneliness, etc.). It is recommended to provide professional psychological counselling services to nurses during the pandemic and maintain these services 24/7.