Brown dots on the body may be due to endocrine disorders, lichen planus or seborrheic keratosis. 1. endocrine disorders: long-term late night bad habits may cause endocrine disorders, may cause pigmentation changes, melanocyte metabolism disorders, may trigger the growth of brown dots on the body. 2. lichen planus: lichen planus is due to malassezia infection caused by chronic skin inflammation, manifested in the cervical chest and back and other sebaceous glands distribution of dense place of the rash, patch, the color is usually brown or reddish. 3. Seborrheic keratosis: due to sunlight stimulation, or skin aging and other factors triggered, there can be brown spots, or plaques with clear boundaries, the surface of the coarse granular feeling. If there are brown dots on the body, it is recommended to go to the hospital in time, early formal treatment.