suffer a relapse
The Spanish phrase 'sufrir una recaída' is translated to English as 'suffer a relapse'. This is often used in a medical or health context to indicate that someone has returned to a less healthy or less improved state after an apparent recovery. It can also be utilized in a broader context to denote any situation where there has been a return to a previous state or behavior, often one that is negative or undesirable.
After suffering a relapse, Maria had to return to the hospital.
This sentence is talking about a person named Maria, who had a relapse, maybe due to a previous illness or condition, and therefore, she had to go back to the hospital for treatment.
Pedro was making progress with his addiction, but he suffered a relapse.
In this context, Pedro is dealing with an addiction, he was showing improvement, but unfortunately he suffered a relapse. This can mean that he took drugs, drank alcohol or did whatever he was previously addicted to again.
If the patient has a relapse, the treatment should start again.
This phrase is typically used in a medical or therapeutic environment. If a patient experiences a relapse in the process of recovering from a disease or condition, the treatment will likely need to resume or start anew.