On June 27, Angela Merkel was seen violently shaking as she was standing next to German President Frank-Walter Steinmeier during the departure ceremony for her justice minister.
"Also as a person, I have a major interest in being healthy and I look after my health", said the chancellor who has her 65th birthday next week, quipping that every birthday made her aware that she was getting older.
The German chancellor suffered a similar bout of trembling on June 18, when she was receiving Ukrainian President Volodymyr Zelenskyy in Berlin.
At Thursday's news conference she was asked if she had consulted doctors about the shaking bouts and if she could say anything about the results, but she was not asked about her decision to sit during the ceremony.More news: Angels throw combined no-hitter on night honoring Tyler Skaggs
A keen hiker too, Merkel herself once revealed that she has a "camel-like" ability to store energy for sleepless all-night summits. Her office has given no explanation for the shaking episodes.
"Of course Merkel knows that the more serious the reason for her shaking, the more pressure there'd be on her to step down", Oskar Niedermayer, a political scientist at the Free University in Berlin, said after Wednesday's incident.
It said she should state clearly whether she has undergone medical tests to get to the bottom of the mysterious trembling spells.
"Merkel is the guarantee of stability and many people want her to serve a full term", he told Reuters.
"I am fine", she told reporters after her meeting with Rinne. "I said that I have to process this event and that I am in this process, and I think that just as it came, it will go away one day".More news: Atletico chief Cerezo threatens Barcelona: 'We have evidence'
"Everyone should do that and recognise that a mega-stressful job can also leave its mark", she added.
German media continued to speculate over possible causes of the shaking, which ranged from low sugar levels to early-stage diabetes and neurological problems such as Alzheimer's.
Merkel is renowned for her work ethic and has a reputation for outlasting other leaders at European Union summits with her ability to focus on the details of complex discussions deep into the night.
Public figures' health is generally regarded as a private matter in Germany and the country's privacy laws are very strict on that type of information.
Merkel, who first came to her role in 2005, announced previous year that once her term ends in 2021, she will not seek a fifth term, nor will she pursue any other political job thereafter.More news: EU signals sanctions on Turkey over Cyprus drilling - draft