U.S. reality Tv star Nene Leakes has told fans she feels "blessed to be alive" after she was hospitalised to treat a mystery illness.

The Real Housewives of Atlanta star alerted fans to her health crisis by posting a picture on Twitter.com which showed her dressed in a hospital gown with intravenous drips attached to both arms.

She writes in a series of posts on the social networking website, "I have been very sick for the past couple of days... My arms are hurting wit (with) these Ivs. Blessed to be alive..."

The star has given no further details about the nature of her condition.