DESCRIPTION
Ustilago is homeopathic remedy prepared is prepared from the fungi, corn smut. It is well known in complaints of the related to sexual organs and genitals as follows

Female
Excessive sexual fantasies with uncontrollable masturbation.
Excessive bleeding during menopause. Blood is bright red in color and partly clotted. Cervicitis.
Profuse menses after miscarriage
Ovaries burn, pain, swell
Cervix bleed easily

Male
Uncontrollable masturbation. 
Spermatorrhea, with erotic fancies and amorous dreams. 
Emissions, with an irresistible tendency to masturbation. 
Dull pain in lumbar region, with great despondency and mental irritability.

Extremities
Muscular debility, the sensation of boiling water along the back. 
Clonic and titanic movements. 
Muscular contractions, especially of lower limbs.

Dose-As prescribed by the physician. It can be taken along with allopathy medicines.

Precautions
Maintain half an hour gap between food/drink/any other medicines and homeopathic medicine. 
Avoid any strong smell in the mouth while taking medicine e.g. camphor, garlic, onion, coffee, hing.

Side effects- None reported.

Use under medical supervision.