What is a common consequence of untreated streptococcal throat infection?

Untreated streptococcal throat infections, commonly known as strep throat, can lead to a variety of complications. One of the well-known complications that can arise from these infections is scarlet fever. Scarlet fever occurs when the strains of streptococcus bacteria responsible for strep throat produce a toxin that leads to a distinctive rash, fever, and other systemic symptoms. The condition is characterized by a bright red rash that typically starts on the neck and face and then spreads across the body, along with a sore throat and high fever.

Other potential complications of untreated strep throat include rheumatic fever and post-streptococcal glomerulonephritis, but in the context of this question, scarlet fever is the most direct consequence attributable to the infection itself. The rapid progression of symptoms and the clear association of the rash and systemic effects with the streptococcal infection underscore the relevance of recognizing and treating strep throat promptly to prevent complications like scarlet fever.