Tamoxifen and skin discolouration

I’ve been taking tamoxifen for only 11 days and I have developed a dark patch on my arm. It looks a bit like a bruise but is not sore. I am very freckly and this appears like freckles all joined up. Could it be an age spot already? Could it be Tamoxifen?

Hi Maire

I have put for you below the link to BCC’s publication regarding Tamoxifen, you are also more than welcome to phone the helpline and have a chat with the nurses here, 0808 800 6000, calls are free.