This case report presents a unique case of a 15-year-old male with post-streptococcal glomerulonephritis (PSGN) who developed posterior reversible encephalopathy syndrome (PRES). The patient presented with symptoms of fever, headache, emesis, visual disturbances, and involuntary movements of all four limbs. On examination, the patient had elevated blood pressure, decreased visual acuity of the left eye, leukocytosis, and uremia. MRI findings showed symmetrical enhancement of superficial and deep watershed areas, predominantly in the occipital and temporal regions. Treatment with antibiotics and anti-hypertensives resulted in the complete resolution of hyperintense lesions seen in brain MRI after three weeks, and the patient remained symptom-free for one month. This case highlights the rare association between PSGN and PRES and emphasizes the importance of monitoring and managing hypertension in patients with PSGN. Understanding the association between these two conditions may lead to earlier diagnosis and treatment of PRES, ultimately improving patient outcomes.