**Core Concept**
Tonsillectomy following a peritonsillar abscess is a surgical procedure that involves the removal of the tonsils after an initial treatment for the abscess. The timing of the surgery is crucial to prevent complications and ensure proper healing.

**Why the Correct Answer is Right**
The correct answer is typically **2-3 weeks** after the initial treatment for the peritonsillar abscess. This allows for the resolution of the acute infection, preventing the risk of spreading the infection to the surgical site. During this period, the inflammation and swelling in the tonsillar bed also decrease, making the surgical procedure safer and more successful.

**Why Each Wrong Option is Incorrect**
* **Option A:** Performing a tonsillectomy immediately after the treatment for the peritonsillar abscess increases the risk of complications, such as bleeding and infection.
* **Option B:** Waiting for more than 3 weeks may lead to a higher risk of recurrence of the peritonsillar abscess or other complications.
* **Option C:** There is no specific evidence to support waiting for a longer period, such as 4-6 weeks, before performing a tonsillectomy.

**Clinical Pearl / High-Yield Fact**
A general rule of thumb is to wait for at least 2-3 weeks after the initial treatment for a peritonsillar abscess before performing a tonsillectomy. This allows for the resolution of the acute infection and reduces the risk of complications.

**Correct Answer:** D.