Light brown spots on the skin may be café-au-lait spots or nevi, the scientific word for moles, explains Cleveland Clinic. Both are types of pigmented birthmarks. Te spots might also indicate neurofibromatosis. More »

WebMD states that vitiligo and pityriasis alba cause light patches on the skin. While people of any color can have these two conditions, it is most easily seen on dark skin. Pityriasis alba mostly occurs on the skin of b... More »

Liver spots, which are small patches of discolored skin, appear as a result of exposure to ultraviolet light, explains the Mayo Clinic. They have nothing to do with the liver or liver function, says MedlinePlus. Also cal... More » Health Conditions & Diseases Skin Conditions

Hyperpigmentation in the form of melasma, chloasma or age spots can cause light brown spots on the stomach and other areas of the skin, according to Kavi. Some lentigines and melasma spots can be caused by an over-produc... More »

Infections, as well as disorders such as sarcoidosis, Wegener's granulomatosis and rheumatoid arthritis, may cause spots on the lung, known as pulmonary nodules, according to Cleveland Clinic. Benign or malignant neoplas... More »

Red spots on the skin can be caused by a number of different conditions or illnesses. Some common causes of skin redness are inflammation, infection and sunburn, according to AARP. More » Health Pain & Symptoms

Chickenpox and hives are conditions that cause red spots on the skin, notes Mayo Clinic. Chickenpox is a contagious viral infection in which spots may cover the entire body, while hives is a skin reaction to things such ... More » Health Pain & Symptoms