Is it permissible to pray Salatul-Istikhara for recovery from a minor illness or for seeing a prophet?

Istikhara prayer is prescribed when one is concerned about a matter, in a spirit of entrustment and reliance upon Allah. We do not know of its prescription for healing from an illness or for a good dream. For healing, one should use legitimate ruqyah, supplication, and medication. For a good dream, one should adopt its means, such as truthful speech and sleeping in a state of ritual purity. Salat al-Hajah (Prayer of Need) is prescribed, consisting of two rak'ahs followed by the reported supplication for need. The description of Salat al-Istikhara is two rak'ahs followed by the well-known supplication, mentioning the desired matter, along with entrusting the affair to Allah and consulting those who offer good advice.