Extra skin

Hi, a few weeks ago I had posted about blisters on my penis, it’s near the Frenulum the extra skin on my penis since I am cut, now I notice it is a bit pinkish but it turns to red whenever I jelq. Is it possible to have a discoloration and blisters on it? Since I never red someone in the forum had this kind of injury, usually it’s on the penis head or shaft? I’m not sure that it is blisters because it seems like there is no fluid or puss inside. Have someone experience this?