Every part of this carries genuine medical risk, and a director talks you through the list at the examination, ahead of any consent form. Bruising leads the list, and it deserves emphasis here more than anywhere else in this family of treatments: a grid means many more punctures than a conventional appointment, so pinpoint bleeding and small bruises are common, and around the eye they can be the size that needs covering for several days. Redness, small raised wheals at each entry point and a warm, tight face are usual for the first hours. Headache in the first day or two is reported often enough to expect.
The complication specific to this technique is depth. If a deposit travels deeper than intended, it stops behaving like skin treatment and starts behaving like muscle treatment, and the face nearest the mouth is where that shows: an uneven smile, a lip that moves differently on one side, or a weakened seal when you drink. Near the eye and brow, a deeper deposit can leave a lid feeling heavy or a brow sitting lower than its twin. Patchiness is the other failure mode, where one zone of the grid responds more than the neighbouring one and the face looks unevenly matt. Some patients find their skin drier and tighter than they wanted. Infection at puncture points is uncommon and possible. Occasionally the response is barely perceptible.
Most of these settle as the effect wears off, and a temporary problem is still a real one while it lasts, since a crooked smile can sit with you for weeks. Stay upright for several hours, keep massage, scrubs and heat off the treated skin for the period your director specifies, and contact the clinic if your smile changes shape, if a bruise keeps growing, or if pain or redness climbs after the first day. One of the three directors is in the building for every hour the clinic is open. Sweat-gland effects are the point of a different service entirely, and the separate cautions for that are on the underarm sweat botox page.