# Multiline header moves page number downwards

Concretely, if the header has two lines, the page number takes the position of the second line and therefore is one line below the page numbers of all pages with only one line in the header. I use the twoside document class and the fancyhdr package for creating the header. I guess that the problem lies in the vertical alignment of the header. The header should be aligned to the top, but apparently is aligned to bottom. My Latex code is

\fancyhead[RO,LE]{\thepage}
\fancyfoot{}


Thank you so much for any advice!

Here is a solution. fancyhdr use \parbox[b] one can change it to \parbox[t]

\documentclass[twoside]{article}
\usepackage{fancyhdr}

\makeatletter
\makeatother

\fancyhead[CE]{\textit{long title long title long title long title long title long title    long title long title long title long title long title long title}}
\fancyfoot{}
\pagestyle{fancy}

\begin{document}

\section{Introduction}
bla bla
\newpage
bla bla
\newpage
bla bla
\newpage
bla bla

\end{document}