The 64-year-old Merkel trembled when she stood next to the Finnish Prime Minister Antti Rinne on Wednesday in an appearance in Berlin.
A spokesman for the German government told CNN that the Chancellor is "in order" – which Merkel's spokesman had already repeated.
"The Chancellor is doing fine, and the talks with the Finnish Prime Minister are well planned," said the spokesman.
Merkel trembled for the first time on June 18, when she met Ukrainian President Volodymyr Zelensky in the German capital. The following week, she seemed to hold on to an event with Federal President Frank-Walter Steinmeier by the arms. Merkel blamed the first incident for dehydration.
Trembling can be caused by a number of conditions that range from neurological disorders to less serious problems such as medical side effects, stress or caffeine intake ,
Merkel has been chancellor since 2005 and is nearing the end of her long term.
She will not be re-elected if her current term ends in 2021. "Very challenging and fulfilling job."
Annegret Kramp-Karrenbauer – widely regarded as Merkel's protégé – was elected last year as the leader of the Christian Democratic Union Party and will probably lead her into the 2021 general election.