LOS ANGELES, July 23 (UPI) -- NCIS actress Pauley Perrette suffered a severe allergic reaction caused by her hair dye that landed her in the hospital.
The 45-year-old star, who plays forensic scientist Abby Sciuto on the hit show, warned her Twitter followers to be careful about hair dye allergies in order to avoid having their heads "swell up like a melon" or worse.