kṛṣṇa-vicchede - because of separation from Kṛṣṇa; duḥkhe - in unhappiness; kṣīṇa - thin; mana-kāya - mind and body; bhāva-āveśe - by ecstatic love; prabhu - Śrī Caitanya Mahāprabhu; kabhu - sometimes; praphullita haya - becomes healthy and developed.

The unhappiness of separation from Kṛṣṇa exhausted the Lord’s mind and reduced the structure of His body, but when He felt emotions of ecstatic love, He again became developed and healthy.