If its only acne marks, continuing your acne treatment with facewash and gels will improve it. Some topical agents also helps in removing the pigmentation and marks of the acne. Even Salic acid 20% gel at night on spots is helpful. Glyco 6 or Glycolic acid 6% is recommended for application on the face. Acne compatible sunscreen is also helpful. Chemical Peeling with glycolic acid or salicylic acid is useful

I suggest you to talk to your doctor about your mother's condition. Based on your mother's condition, he may suggest some different medicine or treatment. And for blisters, making certain lifestyle changes like eating healthy food, taking rest and avoiding certain triggers can prove helpful. 

Skin tags near the­ perineum are ge­nerally innocuous. They rese­mble small protrusions of skin. Friction and rubbing of the skin causes the­ir formation. At times, itchiness or blee­ding may occur if irritated. If they cause discomfort, a doctor can re­adily remove them safe­ly. Maintaining cleanliness and dryness of the­ area can prevent furthe­r development.

You might have a condition called ichthyosis vulgaris, where the skin becomes dry and itchy because it doesn't shed properly. To manage this, it's important to keep your skin moisturized with non-irritating, fragrance-free lotions. Taking warm, not hot, showers with mild soap can also help. Don’t forget to drink plenty of water, as it helps nourish your skin from the inside.