Bulges under eyes post Botox, is this fluid or fat herniation (something else)?

Hello, when Botox is injected in to the lower eyelids, it weakens the musculature that helps keep the fat pads within the lower eyelids constrained. Once the musculature is relaxed with Botox, you may see the fat pads start to come forward. This is typically not an injection for most people, only for those with the "jelly roll" that develops with smiling. This effect should improve once the Botox wears off. Would recommend receiving Botox only from a skilled physician-surgeon, especially around your eyes you should see an experienced oculoplastic surgeon.

It is quite possible that injection of Botox into functional muscle has created this deformity; paralyzed, weakened muscle is allowing protrusion of the fat compartment and affecting your smile as well. It should be expected for this condition to improve within 2-4 months after injection. Hope this helps.

This is not swelling. This is weakened lower eyelid muscle. Your muscle is paralyzed and slumped causing the tissue to heap in this unattractive fashion. I recommend not chasing this problem. Eventually the Botox will wear off and hopefully this issue will resolve. Specially, do not well meaning providers laser or inject this, you will end up with a permanent and hard to fix problem. This can take 4 to 6 months to resolve. Also find a new injector,

Botox is typically not the best choice for wrinkles under the eye except in specific conditions. The look that concerns you was created due to the muscle being relaxed from the Botox. It should improve as the effects of the Botox wear off.

Under eye Botox can be tricky. It can help with extra thickness of the muscle around the eye itself. It does this over time by allowing the muscle to thin out since it is not contracting when it is relaxed. The flip side to relaxing the muscle (orbicularis oculi) is that it is no longer got strong tone which keeps it tight. Imagine the muscle like an elastic waistband. If it relaxes, then it is loose. Because it is loose, the tissues behind it can push forward while it is relaxed. Botox is temporary and usually wears off in about 3-4 months. The muscle will regain its tone and there will be less bulging. It is reasonable to get a lower Botox dose in the future which will allow a little relaxation of the muscle without fully relaxing it. Another option is to avoid Botox in the under-eye region altogether while accepting the muscle will maintain it's thickness and cause wrinkling.