Two months of the baby sweating more, common causes include: physiological reasons, vitamin D deficiency, hyperthyroidism, etc.. 1. physiological reasons: baby metabolism, and the nervous system is not well developed, under normal physiological conditions, infants and young children are more likely to have adults sweating, mainly concentrated in the head, especially before bed, exercise, after eating, clothing too thick, etc., the body heat production increased, sweating increased. 2. Vitamin D deficiency: if accompanied by easy to wake up at night, irritability, growth retardation, etc., may be vitamin D deficiency. 3. Hyperthyroidism: hyperthyroidism will lead to increased metabolism, manifested as excessive sweating, accompanied by wasting, irritability and so on. The two-month-old baby sweats a lot, there may be other reasons, it is recommended to go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.