The dog days in 2023 are counted from the third Geng day of the summer solstice. Since there are 10 days, every 10 day is a Geng day. The summer solstice this year is June 2 1, and the third Geng day is July 1 1, so the dog days in 2023 start from July 1 1.

After sleep, the sun's yang in summer is scattered on the exterior and deficient in the interior. In addition, the weather itself is hot, and people sweat more, which will undoubtedly lead to the loss of nutrition.