Sorry for link. Couldn’t upload picture directly to here.
This could be an infection: is the swelling inside your pee-hole (the Meatus) of just outside, or both?
Have you used any form of skin cream or anything on the head of your penis? What can sometimes happen is something can get inside the Meatus into the urethra and cause a problem. There are also other forms of health issues that can cause problems for the urethra / meatus.
It would be best if you can get a Doctor to check it for you, or go to a Sexual Health Service if that is easier for you …
It is easier to upload images from a Laptop computer or a PC - sometimes the default size of an image from a mobile device creates too large a file size on here and it cannot be uploaded. Try putting the images on a computer and physically drag the image size inwards then save it as a jpeg, then drag and drop, copy and paste, or link to the file on here …