Have you ever woken up with a numb hand or suddenly experienced a strange tingling sensation in your fingers? This condition, commonly described as pins and needles and medically known as paresthesia, can cause temporary numbness, tingling, or reduced sensation. Sometimes, it happens for a simple reason, such as sleeping in an awkward position or resting your arm against a hard surface for too long.

In many cases, the sensation disappears shortly after changing position and relieving pressure on the affected nerves. However, when numbness occurs repeatedly, lasts longer than expected, or gradually becomes worse, it may indicate an underlying health problem that deserves attention. From compressed nerves to certain medical conditions, several factors can affect sensation in your hands. Understanding these possible causes can help you recognize when a symptom is temporary and when it shouldn’t be ignored. Continue below to discover the common causes and important warning signs.