Bolt, who is scheduled to run the 100m at the Golden Spike IAAF World Challenge in Ostrava, Czech Republic on Friday, travelled to Germany after posting 10.05 seconds in his season opener and had treatment there, said Mills.
Bolt is targeting an unprecedented Olympic threepeat at the Rio de Janeiro Games in August where he will be defending his 100, 200 and 4x100 relay titles.
"I think he has a slight discomfort in his hamstring, so he didn't bother push it after that, but he'll be alright," Mills told Jamaican radio station Hitz 92fm. "He's in Germany as we speak and the doctors say he will be fine."
