HRH Princess Maha Chakri Sirindhorn has been receiving treatment at Chulalongkorn Hospital since Friday, according to the Royal Household Bureau.
A statement released yesterday said the Princess was admitted with a stomach ache and fever. A diagnosis showed she had a ureteral stone.
The medical team treating the Princess has advised that she stay in the hospital and temporarily refrain from working.
The Princess is being given antibiotics and analgesics to relieve the pain.