Is There Possible for Any Side Effects from Botox Injections (In the Armpits) Which Have Been Applied 1 Year Ago?

Are your bumps cysts, boils (infected hair follicles) unrelated to the Botox you had?  Is there a possibility that your hyperhidrosis (increased sweating) has resumed and is causing some skin reaction?  See a dermatologist to evaluate your condition.

12 units of BOTOX is a very small treatment for hyperhydrosis.  For the swelling that you are experiencing, I would recommend that you see your physician if the process is getting worse or reoccurs.  This can represent a skin infection.  

Hyperhidrosia, or excessive sweating is an extremely common problem.  Some reports show that it may affect up to 3% of the population.  Injections with Botox are quite effective in alleviating this problem.  One of the downsides though is that the results usually one last up to 8 or 9 months.  If you are having problems, and its been more than a year since your last injections, it's unlikely that the Botox are to blame.  It is probably best for your to discuss this in person with your dermatologist or plastic surgeon.  Your account makes an infectious cause much more likely.

The effects of Botox to the underarms can last up to 6 months, it is highly unlikely that your Botox is currently causing these effects 1 year after injections. I recommend an in-person examination with your physician for further investigation.
I've created a video that reviews treating underarm sweating with botox. I hope this is helpful in your research! 

I inject Botox in the underarms more than 10 times a week and I have never seen this or heard of this problem. We typically give 50-100 injections to deliver the amount of Botox and I do not think that your lumps, bumps are related to Botox injections. Hydradenitis ? Seek a dermatologst to help you out.

It is very very doubtful there is any relationship between a over a year ago BOTOX injections to your axillae and this swelling issue. Seek in person examination. 

It is exceedingly unlikely that the problem you are having is related to the injections one year later.  From your descripition perhaps you have developed some boils.  I would see your local dermatologist for evaluation.

It would be very unusual to any symptoms 1 year after Neuromodulator  injections such as Botox,Dysport or Xeomin. If symptoms persist you should consult with you physician.

Good luck 

It would be highly unusual to have any association of the botox injections a year ago and your recent armpit swelling.  The botox would have disappeared already. As for this current problem, you shoudl definitely have it checked out.

I doubt that the symptoms you are describing are related in any way to the Botox you received in your armpits one year ago.   From your description you may have folliculitis or an irritant or allergic contact dermatitis.  Please see your dermatologist so that you can get a proper evaluation for this condition.