The doctor spent nearly five hours there and administered an intravenous drip, The Telegraph quoted Nyan Win, spokesman for the National League for Democracy, as saying.
"The doctor said Daw Suu's health has improved but she still suffers from cramps. The doctor has prescribed necessary medicines," Nyan Win said.
'Daw' is a term of respect used for older women in Myanmar.
UN claims Aung San Suu Kyi's detention is 'illegal under Burmese law'
Nyan Win last week said that Suu Kyi, 63, had not eaten for three or four days and was suffering from low blood pressure and dehydration.