I'm have intense chest tightness ten days after application of Botox to forehead. When will this symptom stop? Why it happening?

I don't believe this related. I have read the product monograph and nothing like this is reported. You may have something more serious and need to see your primary care physician or ER to ensure something more serious isn't going on."This answer has been solicited without seeing this
patient and cannot be held as true medical advice, but only opinion."

 

Please see your doctor or ER doctor as soon as possible to rule out myocardial, pulmonary, costochondral, myofascial or gastrointestinal pathology. It is unlikely to be related to a Botox injection of your forehead.