my arms are itchy and have bumpswhite itchy bumps after sun exposureitchy bumps from sunsmall cluster of itchy bumps on armitchy bumps on skin after sun exposureitchy bumps after sun exposureraised itchy bumps on armsrandom itchy bumps on armsitchy white bumps on armsitchy bumps on hands and armsitchy bumps on arms and legsitchy bumps on upper arms