In 2014 I had silicone injections which I regret doing. My buttocks become very itchy followed by a burning sensation. (Photo)

Silicone biopolymers can cause severe longterm complications including inflammation and nodule formulation. Although results are longer-lasting that Juvederm or Restylane, long-acting fillers should be avoided.  
Bellafill and Artefill are known to cause granulomas and permanent nodules with swelling. This is not the case for everyone. Silicone biopolymers can also cause similar chronic inflammatory conditions. 
In my practice, I specialize in the removal of Bellafill and Artefill injections, in addition to silicone biopolymers, from the face and body. Initially, treatments are non-surgical with corticosteroids and immune modulators. If unable to be corrected, we can also perform surgery in some cases. 
Silicone biopolymers can also be removed from the body if there are signs of migration or inflammation. All of these filler-types should be removed as early as possible. 
Lastly, our office is conducting ongoing studies of plasma-assisted corticosteroid application, which allows for diffusion of the treatment medication in superficial tissue without causing atrophy. 
Best, 
Dr. Karamanoukian 
Realself100 Surgeon

Regards, Dr Carlos Alberto Ríos regrets that you have been victim of the terrible practice of biopolymers.
You are a carrier of Iatrogenic Allogenosis (allogenic: strange or external substance, iatrogenic: corporal lesion or damage caused by another person). Also, you already present inflammatory reactions, known as A.S.I.A. Syndrome (Autoimmune  Inflamatory Syndrome Induced by Adjuvants), so your best option is to perform a surgery to remove them.

Please remember to be aware, do not let any permanenrt filler to be injected into your face, breast, buttocks, calfs, genitalia, etc. The safest way to increase buttocks is through your own fat injections or through silicone implants.
I hope the information was usefull, have a nice day! Dr Carlos Ríos.