Whether a finger caught in a door can be cured in 3 months needs to depend on the degree of the disease, and can not be generalized, if the disease is mild generally can be cured, some patients need a longer time. Finger caught in the door after a slight redness and swelling can be cured in about 1 month, but if the condition is more serious, need to be given active treatment, it will take about 3 to 6 months to fully recover. If the symptoms are not very serious, the bones are not injured, and the area of subcutaneous bruising is not large, local cold compresses and hot compresses can be applied. At the same time, you can also apply blood circulation and eliminate blood stasis ointment such as blood circulation and pain relief cream, most of which can be recovered within 1 month. If you find a serious condition such as fracture, you need to go to the hospital in time for X-ray and other examinations to clarify the specific condition and then under the guidance of the doctor for treatment.