There are many reasons for small white dots on the body, and you need to go to the hospital to improve the examination to help make a clear diagnosis. These white dots can be considered for the following diseases: 1. lichen planus: This disease is a superficial fungal infection caused by Malassezia invading the cuticle of the skin. It occurs in sweaty areas such as the neck, forehead, back of the shoulders, upper arms, and armpits. The lesions are initially pore-centered, well-defined punctate rashes, which may appear as brown or light brown spots or dots in addition to white. When rubbing with fingers, the skin around the lesion becomes red while the color of the lesion remains unchanged. 4. Post-inflammatory hypopigmentation spots: Hypopigmentation formed after the skin is locally injured and the local wound heals and the inflammation subsides.