1. Possible Causes of Thin Hair and Hairfall

   • Hair thinning and hairfall can be caused by factors such as nutritional deficiencies (e.g., iron, vitamins A, B, D, E, zinc), hormonal imbalances (including androgen levels), stress, and scalp conditions like fungal infections or autoimmune disorders.
   • Acne-prone and combination skin types may indicate underlying hormonal fluctuations or inflammation that can also affect hair health and scalp condition.

2. Reasons for Difficulty in Gaining Weight

   • Difficulty gaining weight may be due to a high metabolism, insufficient calorie or nutrient intake, or underlying medical conditions such as thyroid disorders or malabsorption issues.
   • Hormonal imbalances and chronic fatigue can also contribute to poor weight gain.

3. Causes of Leg Pain and Fatigue

   • Leg pain and fatigue without exertion might be related to nutritional deficiencies (such as iron deficiency anemia or vitamin D deficiency), overuse, or systemic conditions affecting muscles and nerves.
   • Persistent fatigue alongside these symptoms warrants thorough evaluation.

4. Connection Between Symptoms

   • These symptoms may be interconnected through nutritional or hormonal imbalances affecting energy levels, hair growth, skin health, and muscle function. For example, deficiencies in iron or vitamin D can cause fatigue, muscle pain, and hair thinning.

5. Recommended Medical Evaluation and Tests

   • It is important to consult a general physician or endocrinologist for blood tests including thyroid function tests, complete blood count (CBC), iron studies, and vitamin levels.
   • A dermatologist can assess acne, skin type, and hair loss to provide targeted treatment.

6. General Advice and Next Steps

   • Maintain a balanced diet rich in proteins, vitamins, and minerals.
   • Ensure adequate rest and stress management.
   • Avoid harsh hair treatments and maintain gentle skin care suitable for combination and acne-prone skin.
   • Seek professional evaluation promptly to identify and address any underlying causes effectively.

If symptoms worsen or new symptoms develop, please seek medical attention urgently.To narrow down potential causes, we will need some more information.Can you please tell me if you are male or female?