It is normal for swelling to occur after wisdom teeth removal. This is a part of the healing. But if the swelling is severe, your sister should see her dentist or an oral surgeon for a review.

Malpositioned teeth can lead to problems such as difficulty in chewing and talking. It is the result of genetic factors or the acquisition of certain habits like sucking thumb. Braces are a well-known method for fixing such problems. They slowly shift your teeth to the desired position. Do not be afraid, as many teenagers your age wear braces, and is completely normal. But, you can visit an orthodontist to learn more about it.

yes it happens but surgery will not be a major one It will be a minor one and not much complications. Also depends on which teeth it will be done and x ray is a must.

It is recommended that you consult with a maxillofacial surgeon to address any concerns related to jaw/chin surgery. Given your history of a past injury, it is important to thoroughly evaluate any anatomical changes to ensure that the desired outcome can be achieved. In order to determine the best course of action, a thorough consultation with a maxillofacial surgeon is recommended.

You might be talking about temporomandibular joint disorder (TMJ). Such a scenario can occur when the joint that attaches your jawbone to the skull gets stressed out. Among the symptoms are pain, pressure, and trouble opening your mouth. Teeth grinding, jaw clenching, or arthritis are the causes. To help, start with ice packs, keep a soft diet, exercise your jaw, and take care of the stress you experience.