Was könnte die Ursache für rote, juckende Beulen und Wasserblasen an beiden Handflächen sein?

Pigmentations are due to various reasons, Have to find out the underlying cause and treating the cause would be the primary approach Along , will start with depigmenting cream and sunscreens. Would suggest - Peels ,hydrafacial MD to see faster results. You can also visit the dermatologist near your place or have a video consultation with best dermatologist in Jodhpur Lake, Kolkata. Hope this answer helps you.

Without a physical examination, it is difficult to understand your problem and the cause of it. I advise you to visit a dermatologist for proper diagnosis of your condition. Based on that, he may recommend the right treatment for your problem which can include antibiotic or anti-inflammatory creams. 

It seems you are facing a heat rash which is a common condition. Your skin gets too hot due to the sun and it can make your skin red, itchy, and throbbing. After a time, you should avoid wearing clothes that are too tight. Make sure to wear cool, loose-fitting clothes. Moreover, always keep below clean and dry when there is a chance of heat rash. Calamine lotion can also be a good option to use to relieve the burning skin. Drinking enough water is important. 

It looks like you have bad case of ringworm which did not respond to the OTC medicines. I suggest that as soon as possible you see a dermatologist who specializes in fungal infections. They may give you oral antifungal medicine and topical treatment to improve the result. Seek urgent medical care since untreated ringworm can cause problems.
 

This can happen from things such as stress, poor diet, or using harsh hair products. To grow your hair and make it silky again, try eating a well-rounded diet full of fruits and vegetables along with drinking plenty of water. Also, use gentle sulfate-free shampoos, conditioners, and other styling products on your locks. 

The boy seems to have atopic dermatitis also called as atopic eczema. The care is utmost important in his case as the skin is dry and prone to rashes as well as infection. steps should be taken to keep his skin moist at all times. Start by oiling him before bath, use mild cleansers, and apply moisturizers immediately after bath so as to retain water and seal it inside his skin. The flutibact is for immediate reduction of rashes. Start using tacrolimus cream once a week to prevent further rashes. The flutibact is a steroid and antibiotic combination cream, and therefore has to be used judiciously. Please meet a pediatric dermatologist for more information regarding this problem