United Kingdom, March 16 -- Kathy Hilton struggles to "relax" when she has too much on her mind.

The 66-year-old reality star explained that while she likes to go for a facial from time to time, one beauty treatment she doesn't like a manicure because she cannot switch off during it.

She told People: "[I don't like to] get a manicure.

"I find when I go out to get a manicure, I'm thinking about too many things, or I'm bumping into people I know. It's not really that relaxing.

"A facial is always something nice."

The 'Real Housewives of Beverly Hills' star - who has Paris, 44, Nicky, 41, Barron, 35, and 31-year-old Conrad with her husband Richard Hilton - added that her eldest will spend her relation time with sunglasses on without act...