The masseter muscles are a pair of strong muscles that are found on the side and bottom of the face. Hypertrophy of the masseter muscle is a benign condition whose etiology is unknown and consists in the increase in volume of the masseter muscles, thus giving a robust and enlarged appearance of the face at the level of the mandibular line.

• bruxism or gnashing of teeth can cause an increase in the size of the masseter muscle

• masseter hypertrophy

• asymmetry in the lower third of the face

The first step is the consultation with the specialist doctor in which the patient will be evaluated and the expectations he has regarding this procedure, the indications, contraindications and risks of this procedure will be discussed.

The procedure begins by applying an anesthetic cream to reduce the discomfort caused by the injection. A small amount of botulinum toxin will then be injected into the masseter muscles

• autoimmune diseases: lupus, amyotrophic lateral sclerosis

• facial nerve palsy

• pregnant or lactating patients

• infection in the area to be injected

• systemic infection

• poor health

• severe neurological diseases

• psychiatric disorders

• people with a history of stroke

The toxin begins to set in within a few days and the result of this procedure will be seen somewhere within a month of treatment. People with obvious masseter hypertrophy may sometimes need two injections every few months.

Post-procedure recommendations

The patient is advised to follow the following recommendations:

• for 4 hours after the procedure, do not stand with your head bowed or lie down

it is forbidden to apply makeup on the injected area for 24 hours

• avoid heavy physical exertion for a week

• avoid the sauna, solarium and sun exposure for one week after the procedure

it is forbidden to massage their area for 24 hours