There are many reasons why it hurts to press a piece of palm bruise, such as trauma, skin vascular disease, blood system diseases, vascular fragility and so on. 1. Trauma: the hand suffered external trauma, can cause the phenomenon of palm bruises a piece of pressing pain, due to external impact will lead to subcutaneous capillary damage, thus causing bruising, accompanied by pressing pain. 2. Dermatovascular diseases: dermatovascular diseases can also cause the phenomenon of palm bruises, usually due to local stimulation, contact with suspected allergens caused. 3. Hematologic disorders: blood clotting disorders can also cause palm bruises and pain when pressed, which need to be diagnosed through blood system tests. 4. High vascular fragility: a small number of people with high vascular fragility, even in the absence of stimulation, it is easy to form a local capillary rupture, which can lead to the phenomenon of palm bruises and pain when pressed. There are many reasons for palms green a piece of pressure pain, after the symptoms suggest timely go to the hospital to improve the examination, a clear diagnosis and follow the doctor’s instructions to take standardized treatment.