Seven months baby crying with screaming may not adapt to the environment or lack of calcium and vitamin D and other factors, can be soothed, medication to improve the way. 1. physiological crying: baby if loud crying and screaming, may be due to physiological factors, such as hunger, thirst or overdressed and other factors lead to this does not require special treatment, pay attention to warmth and feeding can be. 2. Environmental discomfort: some babies only occasionally appear the above symptoms, may be the indoor environment is too hot or the sleep time is reversed, parents can be timely soothing, and appropriate increase or decrease bedding. 3. Calcium deficiency: if the baby lacks calcium will also have the above situation, but also accompanied by excessive sweating, occipital baldness phenomenon, parents can appropriate calcium and vitamin D supplement, can effectively alleviate the above situation. 7 months old baby often crying and screaming there may be other reasons, it is recommended to the hospital in a timely manner to carry out relevant examinations, after the cause is clear and actively targeted treatment, the above drugs are taken under the guidance of a doctor, not to be taken on their own.