Sarcoidosis of the skin develops in 25% of cases and the skin lesions are often present at the time of diagnosis. Sarcoidosis can cause rash-like red bumps that are warm to the touch. These tender areas usually occur on the shins and ankles and can become quite uncomfortable. The shape and size of the bumps can vary widely and may feel similar to an allergic reaction. Sarcoidosis can also cause sections of skin to become lighter or darker than the individual's natural skin tone.
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