Theyre usually harmless unless they change in the way they look over time. Its characterized by small patches of dark skin on the penis. This change in color is known as hyperpigmentation, and it occurs when. Having dark spots on penis could mean a number of conditions. Fordyce spots are tiny whitish yellow bumps that can appear on the edges, tip and head of penis. the presence of dark spots on the penis shaft is a very common condition that, however, often causes concern among men. As usual, the difficulty of identifying what is and is not normal in the case of the glans and shaft, and the presence of male hormones that can make each penis have different characteristics, can make it difficult to define if a spot is benign or not. There are quite a number of conditions that can lead to the emergence of black spots on penis, some of which include genital lentigines or penile melanosis. This is the most common cause for the occurrence of dark spots on the male shaft. In some cases, red spots on the penis may result from minor irritation and disappear in a day or two. Red spots that develop as a result of something more serious, such as a sexually transmitted. different types of common penile spots include warts flesh-colored growths that usually appear in groups or clusters. Red ulcers, no pain an open sore that is essentially a break or hole in the skin, also known as a chancre. Blisters or lesions red, fluid-filled sacks or spots that appear in groups or clusters. Herpes causes tiny blisters, rather than actual spots, on the penis (and at other points of sexual contact). Herpes is caused by a virus, which is transmitted during sex (including oral sex). it appears as small red, brown, or purple spots on the penis or anus.