My mom woke up with a swollen cheeks but no tooth pain . then she went to her dental she couldn't open her mouth for them to do an x-ray. ?

Panorex: An extraoral radiograph can be taken of her entire upper and lower jaws, teeth, and sinuses, all without her opening her mouth. If her dentist does not have the correct equipment, then she should be referred to an oral surgeon's office. No pain does not mean no problem. Please make an appointment.

See a dentist ASAP: A tooth abscess won't go away without treatment and the infection may spread to your jaw, cheeks, sinus and to other areas of your head and neck. Dentist will treat a tooth abscess by treating the cause and getting rid of the infection. See your dentist ASAP.

Oral surgeon: See an oral surgeon TODAY. A panoramic exam can be taken without opening the mouth. Likely she has a soft tissue abscess which can be drained and antibiotics started.