“I have pain in my finger joints when I wake up. Could it be arthritis?”

Morning stiffness lasting > 45 minutes suggests. Rheumatoid Arthritis
But, other causes of arthritis can be associated with morning stiffness
Ask your doctor about this

Yes

yes

Yes it can be but unless it persists probably not. I recently had someone who decided to do all her planting in one weekend. Come Monday her fingers were hurting. If the joints become red, hot, or swollen, the possibility of arthritis is possible. For more information go to the spine community.com

Great question! There are over 100 types of arthritis, so to further determine what type you might have, you need further evaluation. Historically, a key blood test to determine whether a person has rheumatoid arthritis checked for the presence of rheumatoid factor (RF): antibodies produced by the immune system that can attack healthy joints and tissues. More recently, an additional antibody called the anti-cyclic citrillunated protein (ACPA) has been considered a marker. In either case, I would advise you to follow up with a rheumatologist for further evaluation, as there can be many different causes for your symptoms and it should be evaluated by a healthcare professional.