Hello dear, Understand your concern. If it is not change in color, pain sensitivity,no blood: it is harm less. But you have to examine it repeatedly. Following are the causes of your problem: 1. Fordyce spots These are tiny purple, found on the head of the penis or the shaft. They are normal minute sebaceous glands and are just part of the natural structure of many penises. There s absolutely no need for any treatment. 2. Pearly papules Pearly penile papules are also normal. They are very small bumps, the same colour as your skin, but with a pearly appearance. They usually appear around the glans (head) of the penis in a row. they don t need any treatment. But if you really want them removed for cosmetic reasons, this is sometimes possible. 3.Hair follicles spot 4. Injury: can cause bruise, itself resolved in 4-5 days. You can just apply neosporine poer to prevent infection. Others factor that is associated with it 1. Hygiene problem: If you not wash penis area, segma that is deposited under fore skin irritate penile area and produce reaction 2. Balanitis: inflammation of the penis, caused by poor hygiene, especially insufficient washing under the foreskin area. Thrush, psoriasis, skin sensitivity or allergy to a product used on the penis (such as soap or lubrication) 3. overuse - as in too frequent, too long or too rough sexual activity Take following advice] - Avoid excessive masturbation. - Showering after a workout, changing underwear, using a clean towel to dry off with and not redressing until the area is completely dry - Use formulated penis vitamin formula- Man 1 Man Oil-contain: with vitamins, minerals and shea butter- it moisturizes the skin and prevents flaking or cracked skin while revitalizing and enhancing the sensitivity of the penis Hope this may help you. Best regards Dr. Sagar