What Causes Hormonal Hair Loss in Cats

1 Causes and Treatment of Hormonal Hair Loss

Hormonal hair loss in cats is shedding caused by abnormal hormone secretion that regulates organ function. A typical sign is symmetric hair loss on both sides of the abdomen, with details varying by the hormone involved.

Types of Hormonal Hair Loss

1. Glucocorticoid imbalance. In Cushing’s syndrome, excess cortisol disrupts the hair growth cycle and easily causes shedding, often with skin calcification and pyoderma. Causes include genetic disease, brain tumors, and adrenal tumors.

2. Sex hormone imbalance. Too much estrogen in females can cause hair loss around the genitals and anus. After neutering, falling testosterone can cause thinning on the hips, base of the tail, and sides. Causes range from congenital (ovarian abnormalities) to acquired (testicular tumors or post-neuter hormone shifts).

3. Thyroid hormone imbalance. An underactive thyroid (hypothyroidism) brings slow movement, swelling, weakness, and rare bilateral trunk hair loss. Causes include Cushing’s, thyroid atrophy, and autoimmune disease.

4. Growth hormone imbalance. Abnormal growth hormone usually causes matching hair loss on the neck and thighs, with skin pigmentation changes.

How It Is Treated

1. Treat the underlying disease. A thorough exam finds and treats the root cause — especially related diseases or tumors — to resolve the hidden health problem.

2. Manage hormones. Use the right medication to supplement missing hormones or suppress excess ones and rebalance levels. Also keep the diet sensible, since it helps maintain hormonal balance — ask a vet for a suitable feeding plan.

A stable, comfortable home also helps ease the symptoms. Each type needs a different approach, but combined treatment is the key; consult a vet for a fuller, effective plan.