When a person is allergic to the sun and gets exposed to the sun the allergic reaction to the sun will usually appear as rashes on the skin.
The rashes that appear on the skin due to being allergic to the sun usually appear in the form of blisters, red bumps, or red and scaly.
The allergic reaction to the sun is called polymorphous light eruption (PMLE).
If you're allergic to the sun then you'll also have allergic reactions to the UV rays in a tanning bed as well.
If you use a tanning bed and get those rashes on your skin then you're allergic to the sun and allergic to the UV rays in a tanning bed.
If you're allergic to the sun then you will have to avoid tanning beds and wear some sunscreen and clothing that covers your skin.
The rashes from the allergies to the sun are also usually itchy as well.