Nivolumab is a type of immunotherapy used to treat several types of cancer. According to the information provided, skin-related side effects of nivolumab can include:

1. Skin reactions: Nivolumab can cause inflammation that leads to skin reactions, such as rash, itching, and dryness. These reactions can occur anywhere on the body, but they are most commonly found on the arms, legs, and trunk [2][3].
2. Vitiligo: Nivolumab can also cause vitiligo, a condition that causes the skin to lose its color. This happens when the immune system attacks the cells that produce melanin, the pigment that gives skin its color [2][3].
3. Photosensitivity: Nivolumab can make the skin more sensitive to the sun, increasing the risk of sunburn and skin damage [2][3].

It is important to note that not everyone who takes nivolumab will experience skin-related side effects, and the severity of these side effects can vary from person to person [2][3]. If you are taking nivolumab and experience skin-related side effects, it is important to talk to your healthcare provider. They can help you manage these side effects and determine whether you need to adjust your treatment plan [2][3].

Sources:

1. <https://www.drugpatentwatch.com/p/tradename/SKIN>
2. <https://www.cancer.net/coping-with-cancer/physical-emotional-and-social-effects-cancer/managing-physical-side-effects/skin-reactions-targeted-therapy-and-immunotherapy>
3. <https://www.cancerresearchuk.org/about-cancer/treatment/drugs/nivolumab>