The 23-year-old has reportedly travelled to Spain for treatment - ruling him out of the UAE's clashes.
Abdulrahman missed Al Ain's 4-3 Arabian Gulf League loss at Al Jazira on Sunday due to the issue.
"Omar travelled with his brother Khaled to Barcelona this morning [Monday]," Al Ain team supervisor Mohammed Obeid Hammad is quoted as saying by Sport360.
"He will undergo treatment and an assessment by a specialist there, and we will talk to them again in a few days about the problem.
"We expect Omar will be ready to play again in seven to 10 days.
"We have sent a letter to the UAE FA explaining the situation, and they understand perfectly."
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