Illness from Dryness
Scholars have said that if one sees themselves suffering from an illness characterized by dryness in a dream, it may indicate excessive spending of wealth without God's pleasure, or taking debts and overspending without repayment, thus incurring punishment. Dampness, on the other hand, may be a sign of hardship and inability to work. Insanity might point to wealth acquired by the dreamer commensurate with their madness, but spent extravagantly with a bad companion. It has also been said to signify clothing from an inheritance or gaining authority for those deserving. A child's insanity indicates his father's wealth from his son, and a woman's insanity signifies a fertile year. Head ailments may be interpreted in relation to a leader, and a headache may suggest a sin requiring repentance and good deeds.
Per Ibn Sirin's Muntakhab al-Kalam fi Tafsir al-Ahlam