Dark spots on arms may be caused by sunburn, endocrine disorders, drug factors and other reasons.
1. Ultraviolet radiation: hot weather and long time outdoor activities can cause damage to the skin and form the phenomenon of melanin deposition, resulting in dark spots on the arms.
2. Endocrine disorders: prolonged late night or irregular work and rest time can cause endocrine disorders in the body and increase the secretion of melanin cells, which can lead to the phenomenon of dark spots on the arms.
3. Drug factors: such as iron, bismuth-containing drugs, antimalarial drugs, anticonvulsant drugs, etc., can cause melanin deposition and black spots on arms.
Black spots on the arm can also be seen in other diseases, and it is recommended that patients should consult the doctor in time and follow the doctor’s instructions for standardized treatment.