But Nyan Min added that Aung San Suu Kyi needed a full check-up by her personal doctor, Tin Myo Win, who was detained last week by police for questioning in relation to an intrusion of her off-limits compound by a US citizen.
On Monday, Ian Kelly, a US state department spokesman, urged Myanmar's military rulers to allow Aung San Suu Kyi to meet with her lawyer who lost an appeal against her latest detention order.
Authorities have not said if they will extend her latest detention, which expires at the end of May.
UN legal experts have said her confinement is illegal under the country's law, which allows for a detention of five consecutive years before the accused must be freed or put on trial.
Analysts say it is unlikely the military, which has ruled the former Burma for more than four decades and rejected the NLD's 1990 election victory, would release her any time soon.
The generals have vowed to press ahead with a seven-step "roadmap to democracy", which is expected to culminate in multi-party elections in 2010.
The NLD and Western governments dismiss the "roadmap" and last year's army-drafted constitution as a cover for the generals to cement their grip on power.