Plantar fasciitis occurs when the plantar fascia, a band running from the heel to the toes, becomes inflamed, often due to tight calf muscles and strain from activities like running. This condition is closely connected to the Achilles tendon and calf muscles, which play a key role in movement. Stretching the calf muscles is the safest and most effective treatment, helping alleviate tension and prevent recurrence. For severe cases, physiotherapy or surgical options may be necessary, though steroid injections should be avoided to prevent complications like plantar fascia rupture.