Does this sunscreen have any side effects?

No, this is by far the best sunscreen for oily skin it is certified, tested by dermats, and has no recorded side effects.  Before using, however, it is recommended that you conduct a patch test.

How to do a patch test of the best sunscreen for face?

Patch Test:
WishCare takes skin & hair care very seriously. Providing you with solutions to your problems remains our primary goal. All of our products have been dermatologist-approved, safe, and highly effective.
It is recommended that you do a patch test before using any of our products.
The patch test is an easy way to determine if a new product will cause an adverse reaction. Performing a patch test before introducing a spf 50 sunscreen for face is recommended.
Patch testing steps
The best sunscreen for face should be applied to a small patch of skin on the upper forearm after cleansing it.
Wait for 15-20 minutes or a maximum of 30 minutes.
In case of itching, redness, burning, blistering, or irritation, you should wash the affected area and stop using the product.
Note: Patch tests are only intended to determine early irritation reactions to product(s) and do not guarantee similar results when applied to other parts of the body, including the face. Using a patch test to diagnose hypersensitivity or allergic contact dermatitis does not account for any underlying conditions.

Is PA++++ a good rating?

SPF stands for Sun Protection Factor, which indicates how long the best sunscreen for face will protect you from the sun's burn-causing UVB rays during the day. There are also UVA rays; this is where the PA+ rating system comes in. The best sunscreen for face carries a PA+ rating. On a label, "PA" is followed by plus signs (PA+, PA++, PA+++, and PA++++) to indicate how much UVA protection the best sunscreen for face provides.
PA++++ protects your skin from harmful UV rays and prevents premature aging. Moreover, best sunscreen for oily skin prevents premature aging, dark spots, and sunburn.