High uric acid can cause heel pain, and heel pain is one of the common clinical manifestations of gouty arthritis, mainly because high uric acid causes urate crystals to deposit around the joints, causing a kind of aseptic inflammation of the joints. The acute phase of the disease is characterized by redness, swelling, heat, pain and dysfunction of the affected area, typically the swelling and pain of the first metatarsophalangeal joint, but also the swelling and pain of other parts of the ankle, knee and hand joints. Acute attacks of high uric acid gouty arthritis can be treated and relieved with colchicine or non-steroidal anti-inflammatory drugs, such as diclofenac sodium extended-release capsules. Treatment with uric acid-lowering drugs is generally not recommended during acute attacks, because taking uric acid-lowering drugs at this time may aggravate the symptoms of joint pain due to fluctuations in uric acid.