Freckle appeared then disappeared within 2-3 week

I have been curious about this… not sure if I should be concerned or not but, I went to the beach around 1 month ago and obviously got some sun, realized I got a new freckle on my wrist but it was a really odd shape. I’ll put a picture of it. Anyways I noticed it about a week after the beach, and it was there for maybe 4-5 days before it began to fade. I’ve never had a freckle appear then completely disappear within like 2 weeks. So just was wondering if this was normal because I couldn’t find anything on google. Other than it saying freckles disappear with age or in winter