Smashed middle finger by heavy window. swollen and numb when lightly touched but shooting pain if pressure is applied. tip is bent down?

A smashed finger: with the tip bent, numbness and shooting pain warrants evaluation by a physician. Initial intervention would include buddy-taping

See hand specialist: You describe an injury to your distal extensor tendon, digit 3, but you may also have a fracture. Do not delay, have this addressed now. Head to local medical facility, as delay could result in more difficulty treating this. A hand specialist may be needed to repair.