**Core Concept**
Septal hematoma of the nose is a collection of blood in the nasal septum, often caused by trauma. The nasal septum is a thin wall of cartilage and bone that separates the two sides of the nasal passages. Treatment of septal hematoma is crucial to prevent further complications such as abscess formation, septal perforation, and long-term nasal obstruction.

**Why the Correct Answer is Right**
The best treatment for septal hematoma is incision and drainage. This involves making an incision in the septum to release the accumulated blood and relieve pressure on the surrounding tissues. A nasal pack or splint may be placed to support the septum and promote healing. Antibiotics are often prescribed to prevent infection. The goal of treatment is to prevent further complications and promote healing of the septum.

**Why Each Wrong Option is Incorrect**
* **Option A:** Antibiotics alone are not sufficient to treat septal hematoma, as they do not address the physical collection of blood in the nasal septum.
* **Option B:** Nasal decongestants may provide temporary relief from nasal congestion, but they do not address the underlying issue of the septal hematoma.
* **Option D:** Septoplasty, a surgical procedure to correct a deviated septum, is not indicated for acute septal hematoma and may even exacerbate the condition.

**Clinical Pearl / High-Yield Fact**
In cases of suspected septal hematoma, prompt evaluation and treatment by an otolaryngologist (ENT specialist) are essential to prevent long-term complications.

**Correct Answer: C. Incision and drainage.**