The short answer is that while it doesn't "hurt" to have braces put on, you will almost certainly experience some discomfort, soreness, and pressure, especially during the first few days and after adjustments.
When Braces Are First Applied
The process of getting braces fitted—where the brackets are bonded to your teeth and the wire is threaded through—is not painful. However, you will likely feel some soreness and a dull ache a few hours after you leave the orthodontist's office. This is caused by the gentle, constant pressure the braces are applying to your teeth to start moving them. The most intense discomfort usually lasts for about 3 to 5 days. The pain is typically a dull ache or a feeling of pressure. Your teeth may feel sensitive, especially when chewing, and the inside of your cheeks and lips may get irritated or sore with ulceration from rubbing against the brackets and wires.
After each orthodontic adjustment
Discomfort is usually less intense than the initial pain and typically lasts for 1 to 3 days after the adjustment. Similar to the initial placement, you'll feel pressure and tenderness.
Managing Pain
Over-the-counter pain relievers: Medications like ibuprofen (Advil) or paracetamol (Panadol) can help reduce inflammation and alleviate the pain.
Soft foods: For the first few days after getting your braces or an adjustment, stick to soft foods that require minimal chewing, such as soups, smoothies, yogurt, mashed potatoes, and scrambled eggs.
Orthodontic wax: Tripitaka Dental offers an orthodontic hygiene care kit containing a special wax to apply over any brackets or wires that are rubbing against the inside of your cheeks or lips. This creates a smooth barrier and prevents irritation
Saltwater rinses: Swishing with warm salt water can help soothe any sores or cuts inside your mouth and promote healing.
Cold compresses or cold foods: Applying an ice pack to the outside of your jaw or eating cold foods like ice cream can help numb the area and reduce swelling.