What are the side effects of Botox?

Updated: Apr 10

What do I need to know about my Botox treatment?

Complications and side effects of my Botox or botulinum toxin anti wrinkle treatment

Botulinum toxin, the most common product of which is Botox, is a very common treatment for those wishing to address their fine lines and wrinkles which seem to be a natural part of the aging process. It is a highly effective treatment which has gained popularity and makes it a firm favourite of thousands of regular clients all over the world.

With it being so popular, you may be tempted to take the plunge, but what are the risks? Many providers will shy away from telling their clients about these complications and risks, especially those who are not trained healthcare professionals. At You Aesthetics, our provider Charlotte is a fully trained qualified doctor who not only has an eye for beauty and tailor-making treatments to suit the client, but also for keeping clients safe and healthy.

How long do anti wrinkle injections such as Botox take to work?

Botulinum toxin injections, such as Botox, do not work immediately. Your aesthetic practitioner should tell you that you may start to notice some changes in the movement of the muscles that have been injected a few days after the treatment, with more noticeable changes at 7 days after the procedure. The treatment will reach its maximal effect at 14 days or 2 weeks after the procedure.

At this point, it is sensible to visit your aesthetic practitioner to see if there are any changes that may need to be made. If you still have a little more movement than you would like, or perhaps one side has more movement than the other, the practitioner try to correct this with a little more anti wrinkle treatment to the area.

What are the possible side effects and complications of anti wrinkle injections such as Botox?

Weakness of muscles not intended to be affected

This is very uncommon, but can happen. The way that Botox works is to relax the muscles which cause the wrinkles in the face, reducing the appearance of static lines or preventing them from developing. Sometimes, very rarely, the substance can spread and relax muscles which are not supposed to be affected. This is not dangerous, but can cause a less than desirable cosmetic result. The effect of this will not be permanent however, as the effect of the treatment wears off after 4-6 months.


This is more common but does not happen to everybody. As the delivery of the anti wrinkle treatment requires a needle to the skin, this can lead to minor bruising to the area. You can expect this to wear off in a couple of days to a week, just like any other bruise. Straight after the treatment, there may be some minor bleeding at the entry points of the needle, which should be minor spots and will stop very fast. Certain medications, such as ibuprofen and aspirin, such as warfarin and DOACs, increase the risk of bleeding and bruising as they are blood thinners. You should tell your provider if you are using these medications, and for this reason should only visit a healthcare professional.


This is uncommon. This is highly unlikely to happen if you go to a reputable provider of anti wrinkle treatments and filler who has been properly trained, both in the delivery of these treatments and in a healthcare setting. Doctors and nurses who have attended university received training and were examined in proper hygiene procedures in order to receive their degrees. Therefore, they are much more likely to operate in the correct manner when it comes to delivering a safe, clean and hygienic procedure, thus dramatically lowering the risk of infection to the skin.

Dos and Don'ts


Drink lots of water

Take some paracetamol if the injection sites are sore

Put something cold on the area to reduce bruising and swelling

Go to a reputable practitioner who is a medical professional. Only doctors and nurses have a registered body in the UK, and therefore have ‘something to lose’ if something goes wrong. Not only this, but they have degrees that required them to prove that they had patients’ health and safety in mind


Massage the injection site, lean forward or lie down for 12h after the procedure

Take aspirin or ibuprofen. If these are your regular medications, or you have any other blood thinner on prescription, do not stop taking them just for your procedure and inform your aesthetic provider before you have the procedure

Have any other anti-wrinkle injection within 12 weeks

We are based in Sherwood, Nottingham. To book online click here. No deposits, no fuss.

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