Yellow spots on the shoulders may be caused by macular furuncle, trauma, hyperpigmentation, etc. After the appearance of such symptoms, you should consult a doctor in time, according to the specific conditions of symptomatic treatment. 1. maculopapular furuncle: maculopapular furuncle is a kind of fungal infectious dermatosis, which is a superficial fungal infection caused by Malassezia violating the cuticle of the skin. The patient’s self-conscious symptoms are not obvious, there may be mild itching. Skin lesions at the beginning of a clear boundary of point-like rash, can be brown, light brown, light red, yellowish or white, scattered or fused into a piece of round patches, fungal microscopy to see short rod-shaped bacilli. 2. Trauma: If the skin in the shoulder area is subjected to collision, extrusion and other traumatic injuries, it may cause local capillary rupture and bruising, and during the recovery period due to the absorption of bruises by the organism, the color slowly becomes lighter until yellow, and there is the phenomenon of yellow patches on the arm. 3. Hyperpigmentation: Hyperpigmentation is the change of pigmentation in human skin due to various reasons that cause the skin to show different colors, different ranges and different shades. There is also the possibility of yellow spots on the shoulders. But do not rule out other factors caused by the patient is recommended to consult a doctor in time, the doctor to give targeted treatment.