I had my 2nd botox injection in my neck and shoulders. The amount was increased that time because I had no side effects first time and pain relief was only a month. After 2nd time I had side effects throat and back scull pain that went away after week. After about 2 weeks I started bad abdominal pain. Which I still have after 2 months. Blood tests at er several times show higher white cells and a ct scan says coliteus and I'm still in pain waiting to see gi DR. Taking some pain meds.