Red marks on glans are generally caused by yeast infection, which typically causes red dots that spread outwards over the skin, similar to those which you are experiencing. They tend to be uncomfortable or itchy, but not always. Another potential cause would be herpes, which is a sexually transmitted infection. Wait for few weeks and if the marks continue to increase, you should consult a good general physician or urologist.
White bumps on the shaft of the penis may be pimples, a skin cyst, or ingrown hairs. These are common and they’re nothing to worry about. Another condition that’s normal and no cause for concern is pearly penile papules.
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