After applying cream on my dick it got pill and...

What is the treatment of Skin rash on the penis ?
It must be an allergy from the topical cream that you have applied so you should avoid scratching the skin as much as you can and avoid using this cream another time . You should also wear comfortable and clothes that are made of cotton . Avoid wearing tight clothes and apply creams such as Triderm twice daily to relieve rash and itching of the skinn . You should do clinical assessment if your condition presisted or worsens in the next few days
What are the causes of Skin rash on the penis

• Skin allergy
• Topical medication allergy 
• Fungal infection
• Bacterial infection
• Sexually transmitted diseases
• Eczema 
• Other causes 

What Should you do at the moment ?
You should follow the tips and advice provided to relieve Skin rash on the penis . If there is no improvement , you should consult your dermatologist for assessment