Why does my finger look thicker?
You might have a blockage in your lymphatic system
Your fingers and toes may swell, and usually, your arms and legs will swell, too. Your skin may also feel tight or thicker than usual, according to a report from the National Cancer Institute.
The truth is, the actual size of your hands is limited by the size of your hand bones. No amount of stretching, squeezing, or strength training can make your bones any longer or wider. That said, the hand is powered by about 30 muscles, and they can grow stronger and more flexible with a variety of exercises.
The finger joints lose cartilage and the bones thicken slightly. Finger joint changes, most often bony swelling called osteophytes, are more common in women. These changes may be inherited. Lean body mass decreases.
Swollen fingers refers to the enlargement of an individual's fingers as a result of an underlying physical cause. Potential causes include arthritis, exercise, high salt levels, allergic reactions, medication side effects, and injury.
Carlson, MD. Dactylitis is a symptom that is most often seen in patients who have inflammatory Psoriatic or Rheumatoid arthritis, which are auto-immune diseases. It is also known as “Sausage Finger” or “Sausage Toe” because of the localized, painful swelling that causes digits to look like sausages.
For some people, excess weight tends to go right to their fingers and hands. While it's not possible to spot-reduce fat in any one area of the body, there are some things you can do to slim down your fingers.
The truth is, the actual size of your hands is limited by the size of your hand bones. No amount of stretching, squeezing, or strength training can make your bones any longer or wider. That said, the hand is powered by about 30 muscles, and they can grow stronger and more flexible with a variety of exercises.
Inheritance of Genes: The shape and size of our hands are inherited from our parents through a complex interplay of genes. You inherit half of your genetic material from each parent, which includes genes responsible for the development of various body parts, including the hands.
Pinch a soft foam ball or some putty between the tips of your fingers and your thumb. Hold for 30 to 60 seconds. Repeat 10 to 15 times on both hands. Do this exercise two to three times a week, but rest your hands for 48 hours in between sessions.
While you can't make your fingers any longer or your palm any larger, a few easy exercises can make your hands stronger and increase your fingers' flexibility. These exercises can give you a firmer grip and a slightly wider hand span.
Does finger thickness change?
Your finger size will change slightly throughout the day, depending on temperature, weather, activity, etc. Your fingers tend to be a little puffy in the morning, they will shrink a little when cold and expand slightly when hot, but typically settle into a normal size during the day.
Long, slender fingers can be normal and not associated with any medical problems.

The swelling makes your fingers appear puffy and the joint definition isn't visible, so they look, well, sausage-like. But no matter what you call it, the condition is caused by inflammation of all of the tissues around your joint, including the skin, the tendons, and the synovium or lining of the joint.
During exercise, more blood flows to your heart and lungs and to the muscles you're working. Less blood may flow to your hands, making them cooler. The blood vessels in your hands may react by opening wider. This could lead to hand swelling.
Finger Arthritis Symptoms
They can make the knuckles enlarged, swollen, and stiff. 6 People who have enlarged joints due to osteoarthritis often complain that their rings do not fit or can't be removed. Rheumatoid arthritis often causes similar symptoms.
For more stubborn calluses, you can try gently exfoliating the area with a pumice stone. You can find these on Amazon. Try going over the area with a pumice stone a few times.