Explore the possible causes of daily sleepiness and weakness, particularly related to fatigue symptoms associated with heart disease.

Explore the possible reasons why children may not feel pain when bending down but experience pain when lifting their heads, including fatigue, overexertion, lumbar muscle strain, or tendon injury.

Explore the possible causes and suggestions for an eight and a half-year-old boy who frequently experiences headaches, dizziness, and overall weakness.