In Jainism, Upsarg (उपसर्ग) refers to obstacles, troubles, or afflictions, particularly those caused by external agents or beings. These are difficulties or sufferings imposed on a person, especially on spiritually advanced souls, by others out of jealousy, malice, or hostility.

A classic example in Jain tradition is the series of upsargs (trials) faced by Tirthankaras like Lord Mahavira. For instance, during his meditation and spiritual practices, Mahavira was subjected to various upsargs by celestial beings, animals, and humans who tried to disturb his penance. Despite these, he remained steadfast, displaying supreme forbearance (kṣamā).

Jain texts often classify suffering into:

• Parishaha: Sufferings due to physical or natural causes.
• Upsarg: Sufferings inflicted by other living beings.

Enduring upsargs with equanimity is considered a mark of spiritual advancement in Jainism.