"It's important to stay careful about this," Puel told British media.
"It's a strong league and difficult to keep a good position on the table and when we see the table, the gap between six, seven, eight teams is very short with the number of points.
"This is why it's important to stay careful about this."
Puel also urged his players to maintain their focus, starting with Wednesday's home match against a resurgent Crystal Palace, who have won their last four league games.
"I think it is important to stay with a good concentration," Puel said. "We have a seven-point advantage and its important to keep improving.
"All of my players are ready to make a good game against this team and of course we aware of what is behind us, but after we can see forward. For the moment its important we take points because one win or one lost can make a difference in the table."
Southampton have two wins in their last five league games and lost 3-0 to Palace in the reverse fixture in December.
(Reporting by Aditi Prakash in Bengaluru)
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