Final answer:
The student may be experiencing symptoms of obsessive-compulsive disorder (OCD) and health anxiety. It is important for them to seek professional help for evaluation and treatment. They may also benefit from academic support services to address their declining grades.
Step-by-step explanation:
The symptoms described in the question suggest that the patient may be experiencing symptoms of obsessive-compulsive disorder (OCD) and health anxiety. OCD is a mental health disorder characterized by intrusive thoughts and repetitive behaviors, while health anxiety is a condition in which an individual has excessive worry and fear about having a serious illness. In this case, the student's declining grades and excessive time spent in the shower scrubbing may be related to his anxiety about contracting an illness.
It is important for the student to seek professional help, such as a therapist or psychiatrist, who can provide a comprehensive evaluation and develop an appropriate treatment plan. Cognitive-behavioral therapy (CBT) and medication, such as selective serotonin reuptake inhibitors (SSRIs), are commonly used to treat OCD and health anxiety.
Additionally, it may be helpful for the student to consult with a school counselor or academic support services to address the academic challenges he is facing. They can provide resources and strategies to help him manage his time, improve study habits, and cope with stress.