Something wrong with the corners of my mouth

Hi all! Id really love if you could help me with what’s wrong/how to fix the issue with my mouth.

Rarely I smile too big where if my lips are dry, the corners of my mouth will rip and recover in a few days.

This time, its been a few weeks and still no recovery and it almost looks like my lips are just spreading bigger in the corners? The corners of my mouth also sometimes re-cut and I taste blood, but the below images is how they look.

I constantly put on lip ointment to keep moisturised, but still not getting any better. They’re always red raw and I have to keep wiping dry skin from the corners of my mouth.

Any advice would be so appreciated!

Note: I have not kissed anyone/done anything in months and months. My family have no current health issues (we share cutlery/cups etc).