What type of pillow should a four-month-old baby use? Is it okay to use a buckwheat husk pillow?

What type of pillow is suitable for a four-month-old baby, and is a buckwheat husk pillow appropriate?

How can I ensure my baby sleeps healthily?

Discuss the weight loss issue for a 16-year-old teenager who is 175 cm tall and weighs 80 kg, and provide professional medical advice and health management solutions.

For a 2-year-old, it is recommended to use a pillow that is 3-4 millimeters high, with breathable and soft material.

Discuss the appropriate timing and considerations for using pillows as babies grow through different stages, as well as the selection of pillows.