The feeling of numbness and coolness in the lower abdomen and legs may be caused by lack of exercise, peripheral neuropathy, vascular lesions of the lower limbs and so on. 1. Lack of exercise: it may be due to occupational factors, long-term lack of exercise, for example, sedentary people or often squatting work, the lower limbs may be subjected to long-term compression, and it is easy to lower limb blood circulation is poor, thus feeling numbness and cool sensations in the legs, sometimes spread to the abdomen. 2. Peripheral neuropathy: For example, sciatica or lumbar disc herniation may easily lead to peripheral nerve lesions, thus causing symptoms such as numbness and coldness in the abdomen and legs. 3. Vascular lesions in the lower limbs: most commonly seen in arterial embolism or deep vein embolism, which will affect the blood circulation in the lower limbs, resulting in slower blood circulation, thus causing related symptoms. The symptoms may be caused by other reasons, it is recommended to go to the hospital in time to find out the cause and then targeted treatment or therapy.