Why my hands hurt so bad every night?

Hard to say: Hard to say without an examination. Possibilities could include, various types of arthritis, gout, carpal tunnel syndrome. I would probably suspect carpal tunnel syndrome first. See your doctor who can determine the cause and steer you to the best treatment.

Many reasons: There are many reasons with osteoarthritis from general wear and tear being the most likely explanation. However there a the many other potential causes that may be an indication if systemic disease that will benefit from evaluation and treatment.

Night pain: Pain in hand at night may be sign of carpal tunnel syndrome start sleeping a wrist brace to see if it help the night pain.

Numb: Hands that are painfully hurting at night in the palmar surface may be carpal tunnel syndrome a condition that it is a symptom of other conditions such diabetes and hypothyroidism. Pain is different types such numbness, electricity, pain, buring.