Without examining it's difficult to precribe any medications. Consult a dermat to get it checked.

It sounds like you may have acne and skin condition like seborrheic dermatitis. To manage these conditions wash your face twice a day with a gentle cleanser. Avoid touching your face, use noncomedogenic skincare products, try acne treatments, and use a moisturizer. If the symptoms are severe, consult a dermatologist for specialized treatment.

Psoriasis can be a chronic skin condition that require ongoing treatment. If you have tried several treatments without success, then discuss with a dermat to determine appropriate treatment plan for your condition. Medications, phototherapy, or biologic treatments are few options. Moreover you can try to avoide stress, smoking, and alcohol, and maintain a healthy lifestyle.

Dryness or itching are usually due to fungal or allergic infection. Don't use almond oil or any other product on the affected area since it can worsen the condition. Consult a dermatologist and let them check and they may recommend a topical ointment or antifungal or antibiotic cream. 

The skin appears darker or more pigmented usually after the first session of Q-switch laser treatment for hyperpigmentation. The treatment causes a temporary inflammation in the skin, which increases melanin production and darkens of the skin. 
Talk to your dermatalogist as they can adjust the treatment parameters or suggest alternative treatment options based on your skin type and concerns.

Consult with a dermatologist for Perioral dermatitis treatment before considering hair transplant surgery. The dermatologist can evaluate you condition and provide treatment acccordingly. Once your condition is under control, you can discuss hair transplant options with a hair transplant surgeon.

Veins do appear more visible naturally after sclerotherapy treatment, but they usually improve over time as the body reabsorbs the treated veins. Its best to discuss your concerns with your dermatologist and follow the recommended treatment. Avoid prolonged sitting or standing and to wear compression stockings as recommended to decrease swelling and heal faster.

Bruising and discomfort after sclerotherapy are natural which normally resolves within a few days. But since you said your veins look worse and are more visible after the procedure could indicate a complication. It's good that you have already spoken with your doctor, but still experiencing discomfort or have any concerns, follow up with them promptly. 

In some cases the veins may fade on their own over time, but if the issue is related to the sclerotherapy procedure, additional treatment can be needed. Its best to follow up with your doctor to discuss your options and determine the best treatment.

There are many reasons for a persistent red rash. It could be due to contact dermatitis, venous insufficiency, cellulitis, or allergic reactions. See a dermat to get a proper diagnosis and treatment.

Vitiligo causes loss of pigment resulting in white patches on the skin and there is no cure for vitiligo, there are treatment options to control its spread and improve its appearance. Consult a dermat to get it checked.