What would cause a person to loss lot of weight in three month?

Several factors can cause a person to lose a significant amount of weight in a short period like three months. Here are some possible reasons:

1. Severe Calorie Restriction: Consuming significantly fewer calories than the body needs can lead to rapid weight loss. This could be due to restrictive diets, fad diets, or disordered eating patterns.

2. Medical Conditions: Certain medical conditions can cause unintended weight loss, such as hyperthyroidism, diabetes, or cancer. These conditions affect metabolism or overall body functions, leading to weight loss as a symptom.

3. Malabsorption Disorders: Conditions that affect the absorption of nutrients from foods, like Celiac disease or Crohn's disease, can result in weight loss due to malnourishment.

4. Medications: Some medications, such as certain chemotherapy drugs or diabetes medications, can cause weight loss as a side effect.

5. Stress and Anxiety: Chronic stress and anxiety can impact appetite, digestion, and metabolism, potentially leading to weight loss.

6. Infections: Infections that cause prolonged fever, diarrhea, or other symptoms can result in weight loss due to reduced appetite and increased energy expenditure.

7. Changes in Lifestyle: Drastic changes in physical activity or lifestyle, such as starting an intense exercise regimen without adequate nutrition, can cause rapid weight loss.

8. Emotional Distress: Emotional stress or traumatic events can temporarily affect appetite and eating habits, resulting in weight loss.

It's important to note that sudden, unexplained weight loss is not always normal and could be a sign of an underlying medical condition. If you experience rapid weight loss without any apparent reason, it's crucial to consult a healthcare professional for proper evaluation and guidance.