Plantar Fasciitis: This condition is characterized by inflammation of the plantar fascia, leading to pain and swelling on the heel. It's a common issue, especially among individuals who engage in activities that put stress on the heel, such as running or standing for long periods.

Achilles Tendinitis: Inflammation of the Achilles tendon can cause pain and swelling at the back of the heel. This condition is common in athletes or individuals who suddenly increase their physical activity.
Bursitis: Inflammation of the bursae (fluid-filled sacs) near the heel can cause swelling and pain. This condition often results from repetitive motion or pressure on the heel.
Heel Fat Pad Atrophy: This condition involves the loss of the fat pad on the heel, leading to pain and swelling due to the lack of cushioning.
Sever's Disease: A common condition in adolescents, characterized by inflammation of the growth plate in the heel, causing pain and swelling.

Osteomyelitis: A bone infection that can cause pain, swelling, and redness on the heel. Although less common, it's a serious condition that requires prompt medical attention.
Tumor (Benign or Malignant): Although rare, tumors can cause a bump on the heel. Early detection is crucial for effective treatment.
Infection (Cellulitis or Abscess): Bacterial infections can cause swelling, redness, and pain on the heel. Prompt treatment with antibiotics is necessary to prevent complications.

Paget's Disease: A rare condition characterized by an abnormal breakdown and regrowth of bone tissue, which can cause pain and swelling on the heel.
Heel Neuroma: A rare condition involving the growth of nerve tissue on the heel, leading to pain and swelling.
Gout or Pseudogout: Although more common in the toes, these conditions can cause sudden, severe pain and swelling on the heel due to the deposition of urate crystals.