Injections with Botox or Dysport have essentially no downtime. Your skin may be red from the injection for about 15-30 minutes. There is an unlikely chance of a tiny bruise. The injection starts to take effect after 3-5 days and will take 10-14 days to reach full effect. The effects can last for ~4 months depending on the amount injected. Overall, it is a very well tolerated procedure.