Her cousin, Claire Hill, posted an appeal on Facebook urging anyone with information to get in touch.
She said: “Appealing to anyone who may have had contact with Rachel Kerr in the last few days, and any of her contacts in Morocco.
“Please get in touch if you have any information. Her family are extremely concerned for her welfare.
“Last known to be staying in the Caribbean Village Agadir, checked out on Saturday and we’ve not been able to contact her since then.”
On Instagram, where she has more than 9,000 followers, she had recently been posting about her time in Morocco.