feel like a new man—begin to feel much better physically or mentally:
- Luis felt like a new man when he finished reading her message.
Note: The expression does not correlate in meaning with the phrase become another man—used of smb. whose character has noticeably changed:
- In a year’s time, he became another man, a good one, and the peasants were proud of their landlord.
feel one’s old self again—return to one’s normal condition of mind and body:
- After an overnight stay in the hospital, he looked and felt his old self again.