United Kingdom, Aug. 15 -- Teddi Mellencamp is battling "severe anxiety" during the latest stage of her cancer treatment.

The Real Housewives of Beverly Hills star, 44, has been diagnosed with stage four melanoma which has spread to her brain and lungs and previously underwent surgery and radiation treatment before starting a course of immunotherapy and she's now revealed the sessions have left her feeling highly anxious for "no apparent reason".

In a video posted on Instagram. Teddi said: "OK for those of y'all who've gone through immunotherapy, did you have severe anxiety? Just on random days for no apparent reason?

"Like today I was able to walk, I did the [Two Ts in a Pod] podcast and now I'm just sitting here full of anxiety. Is t...