Is it Okay to Get Botox to Frown Lines Only and Not Forehead as Well?

Thank you for your question. The frown lines between the brows can be address two different ways:
1) Botox or Dysport can be used to soften the deepening of the frown lines when making a frown expression. The treatment may even soften the lines that are present at rest. The effects typically last 3-4 months depending on the dose.
2) Restylane or Juvederm can be used to soften the frown lines that are present even when you don't make an expression. This can last for a year or more when used in conjuction with Botox.
For someone who has concerns with both the static lines (without expression) and the dynamic lines (with expression), then using both products would work well together.
I often find that patients who return after a Botox or Dysport treatment in the frown areas complaining it didn't work, is due to the confusion between the static and dynamic frown lines. They continue to see the static lines even though the dynamic lines have softened considerably.It is ok to only get one option, and it is ok to only get the frown line treated while leaving the forehead lines alone.

"​For glabellar lines (or frown lines / ""11"" lines), we inject Botox, Xeomin, or Dysport into the muscle, causing the muscle to weaken and improving the appearance of the lines. These work by binding to receptors that send nerve signals for muscles to contract. Since your body makes new receptors and neurotransmitters all the time, it needs to be maintained otherwise the wrinkles will slowly return as the muscle regains function over time. Neurotoxins take 2 to 4 weeks to start working and lasts for up to 6 months.

For deeper glabella lines or strong 11s, I use a combination of Botox with fillers, lasers and microneedling with PRP. I suggest getting a formal evaluation with an experienced cosmetic dermatologist and expert in lasers and fillers. Best, Dr. Emer
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I too charge for botox and dysport by the area which is usually about 25 units.   But in reality, I charge a minimum of 25 units. 100% of the time, a person can benefit from that doseage.  It is not uncommon to do more and maybe not a full 25 units for another area and we just charge for what is used.  Talk to your provider, if they are not accomodating, then find someone else.Good luck