Answer:
The 55-year-old man is experiencing chronic muscle weakness and struggles with activities like walking up stairs, combing hair, and lifting objects overhead. This could be due to a neuromuscular disorder or muscular dystrophy, both of which cause progressive muscle weakness. To determine the exact cause, the doctor will conduct a thorough examination and may order tests like blood tests and genetic testing. The patient may be referred to a specialist for further evaluation and treatment. It's important for the patient to see a healthcare professional for an accurate diagnosis and proper care.