1. Dandruff: Use anti-dandruff shampoos containing zinc pyrithione or ketoconazole. Ensure thorough rinsing. 2. Seborrheic Dermatitis: Medicated shampoos with ingredients like selenium sulfide or salicylic acid can be effective. 3. Lice Infestation: Specialized lice treatment shampoos and thorough combing with a fine-tooth comb are essential. Follow up with appropriate environmental cleaning measures. 4. Infections: For bacterial or fungal infections, consult a healthcare provider for the appropriate topical or oral medications.