How to avoid underfull boxes in itemize?

Question

I am using an itemize as shown in this example:

\begin{itemize}
    \item \textbf{The First}\\
    Some text here over fifty lines.... bla blah
    \item \textbf{The Second}\\
    Other text here over multiple lines... bla blablaaah
    \item \textbf{...}\\
\end{itemize}

The results looks as expected for me. :-)

But because of the \\ I get some underfull box messages. I also tried to use \newline or \linebreak insted.

How to avoid these overfull box messages?

Answer 1

Avoid using \\ out of tables, and never use it at the end of a paragraph.

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage{enumitem}

\begin{document}

\begin{description}[style=nextline,format=--- \textbf]
\item[The first]
 Some text here over fifth lines\ldots{} bla blah

\item[The second]
Other text here over multiple lines\ldots{} bla blablaaah
\end{description}

\end{document}

Answer 2

Like this :

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}
\usepackage[frenchb]{babel}
\usepackage{enumitem}

\begin{document}

\begin{itemize}
\item \textbf{The first}
  \begin{itemize}[label=, leftmargin=0mm,]
  \item Some text here over fifth lines\ldots{} bla blah
  \end{itemize}

\item \textbf{The second}
  \begin{itemize}[label=, leftmargin=0mm]
  \item Other text here over multiple lines\ldots{} bla blablaaah
  \end{itemize}

\item \ldots

\end{itemize}

\end{document}