Had itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Impossible to say. I am sorry but it really is impossible to say what your rash is caused by without seeing it. Heat rash should have resolved by now. Please see a good dermatologist or your family doctor. Be well.
Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.

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Itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. "heat rash" is a pretty non-specific term. The fact that the bumps have lasted a week or so means it's probably something a little more significant. The rash could be allergic in nature, whether to the sunscreen or something environmental. A trial of topical steroid cream, like hydrocortisone, may help, but if it doesn't improve in the next few days, i'd have it checked by your doctor.
Possibly, . A heat rash is a definite possibility, but contact allergy associated with your sunscreen or topical creams placed may do the same thing. Recommend stop scratching them. Scratching them will further the insult, and the redness is from the dilation of skin vessels (therefore, red). Unroofing them may cause problems. Ok to try 1% hydrocort creams. See physician if not cleared in a week.
Allergy vs drug RN. This could be due to any number of things including heat rash. I would also be concerned about a possible allergy or sensitivity to one of the ingredients in the sunblock.

Itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.
Dermatitis. Sounds like some sort of contact dermatitis or heat given the timing of the symptoms and the event. If it doesn't get better with conservative mgmt over the next few days you should consult with a dermatologist.

Itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.
Could be. Is very difficult for us to make a diagnosis without seeing the lesion and having more information. If you want to have an accurate diagnosis, you should contact your primary care physician.

Had itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.
Depends. Difficult to tell, you should follow up with your dermatologist or primary care physician.

Had itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.
Heat or allergy? This may be an allergic reaction as well to the sunscrren.

Had itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.
Need personal exam! Even though you have provided a description, actual examination of your rash is needed to provide a meaningful diagnosis. See a dermatologist if this persists or worsens.

Had itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.
Personal exam needed. Even though you have provided a description, actual examination of your rash is needed to provide a meaningful diagnosis. See a dermatologist if this persists or worsens.

Had itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.

Had itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.

Had itchy bumps for a week now after going biking w/ sunscreen. Seem to be clear/flesh colored until I scratch them and they turn red. Is it heat rash?

Maybe. It is possible, depending on location of the bumps/rash. Areas under clothing or heavy perspiration are potential sites for such rashes. If on outside skin areas where sunscreen was applied, may be assoicated with contact allergy to the sun lotion or its preservatives contained. Do not scratch them. You may try use of 1% hydrocortizone cream (cortaid) applied 2-3 times a day... No scratching.
More info needed. Where are these bumps? Are they where you applied sunscreen? Or under your clothing? Does anything make them better? Anything make them worse?