yes. It can. start with oral antibiotics.

Do 7 to 14 days course of antibiotics with Betadine gargles at least 4 to 5 times a day Tab Montair LC 1 tab In night will also help resolving any irritation in throat

Hi, I am Dr Atul Kumar Nimawat MS ENT. Yes, bacterial pharyngitis can sometimes persist for up to 2–3 weeks if left untreated, though this is not very common. Typically, streptococcal pharyngitis resolves within 7–10 days with appropriate antibiotics. However, in cases where the infection is not treated or if the immune response is altered due to repeated episodes, the inflammation may linger longer. From what you’ve described — a sore throat that began with tonsillitis and pharyngitis, associated with body aches, and now progressing to low-grade fever and a swollen lymph node — it’s quite likely that the symptoms are still due to the underlying throat infection. The lymphadenopathy in your neck is most likely reactive, secondary to the pharyngeal or tonsillar infection.

The cause could be bacterial or viral pharyngitis. The swollen lymph nodes and fever can be due to unresolved infection in throat. You need to see an ent specialist and get an examination.

Warm watwr gargles wit antibiotics