Hi, I found a small ish red hard lump on the shaft of my penis yesterday. It is a little swollen and about 5mm across. It started of as only being red, but has now gotten a slightly yellow tip to it. It is not painful, just sore when I touch it.. feels irritating. I feel like it is probably a lymphocele, but I do not think they are usually painful, hence why I am contacting a doctor. It does not hurt when I urinate, or have an erection.