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Battling obesity at age 4

Joe Tan / Reuters

Lu Zhihao, right, sleeps during a noon break at a kindergarten in Foshan, Guangdong province on Tuesday, March 29.

Joe Tan / Reuters

Lu Zhihao walks with his parents on a street in Foshan on Tuesday.

Young Lu Zhihao weighs 136 pounds at 3 feet 7 inches tall.  Reuters reports that Lu put on weight dramatically since his appetite increased when he was 3 months old. His worried parents took him to several hospitals, but the reason for his obesity remains unknown, though it is possibly due to his dietary habit, according to local media.

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More about childhood obesity here.

Three-year-old Lu Hao's parents say their son weighed just over 5 pounds at birth but now tips the scales at 132 pounds. TODAY.com's Dara Brown reports.